Defender 110 My First Proper Breakdown, police assistance
Discussion
Defender 110 – My First Proper Breakdown, and What an Experience!
Well, it finally happened. One of those breakdowns you always think will happen to somebody else, but never you. And what an experience it turned out to be!
So, this morning I was doing a favour for a friend, moving their horse in our new-to-me 2023 Defender 110, 3.0-litre. Nothing particularly exciting, just a short 15-minute journey with a twin-axle horsebox on the back.
Around 9am, I collected the horse, dropped it off without any problems, and stopped at the petrol station to top up before heading home.
When I started the Defender, a warning appeared on the dashboard:
"Low battery, please restart engine."
Strange, I thought, but the vehicle started and drove absolutely fine. No obvious issues, no strange noises, nothing to suggest what was about to happen.
Heading back towards my village, I started climbing a fairly steep hill, still towing the now-empty horsebox.
Now, to put this hill into perspective, the road has an average gradient of 8%, but at its steepest point, where I happened to be stranded, the gradient reaches 21%!
That's a seriously steep incline, especially when you've got a heavy 4x4 with a twin-axle horsebox attached.
And then, without any warning whatsoever, the Defender completely died.
No engine, no power, absolutely nothing!
Naturally, I applied the footbrake and attempted to select Park.
Nothing.
Tried the electronic handbrake.
Nothing.
The entire vehicle had shut itself down, leaving me sitting on a 21% gradient, with a twin-axle horsebox attached, the gearbox stuck in Neutral and my right foot being the only thing stopping the whole lot rolling backwards!
Welcome to modern motoring!
I tried everything I could think of. Turning the ignition off, locking the car, unlocking it, attempting to restart it, trying the handbrake again. Absolutely nothing worked.
By this point, traffic was passing in both directions roughly every 30 seconds, and I was beginning to realise just how serious the situation could become.
At one point, while trying to sort things out, the vehicle started rolling backwards.
I'll admit, that was a bit of a brown-trouser moment!
Time to Call for Reinforcements
I managed to call two friends.
Harry, who had access to my garage, was dispatched to collect my jump pack, some spare batteries and jump leads.
Frank, who had a towball on his Freelander, was asked to come and rescue the horsebox.
Both were around 15 minutes away.
In the meantime, I was still sitting in the Defender, foot firmly planted on the brake pedal, unable to get out, unable to select Park and unable to apply the electronic handbrake.
After several minutes of this, I decided the sensible thing to do was call 999.
The 999 Call – You Couldn't Make It Up!
At 9:48am, I called the emergency services and requested police assistance.
I explained that I was stranded on a hill with a gradient reaching 21%, towing a horsebox, with a vehicle that had suffered a complete electrical failure.
I couldn't select Park, couldn't apply the handbrake and couldn't leave the driver's seat because my foot on the brake was the only thing holding the vehicle in position.
With traffic constantly passing in both directions, I was concerned that if the vehicle rolled backwards, we could have a very serious accident.
The response?
"Just put the handbrake on."
I explained again that the Defender has an electronic handbrake and, with the electrical system completely dead, it wasn't functioning.
Again, I was told to apply the handbrake.
After explaining several times that this was physically impossible, the call handler asked me to wait.
A short while later, he returned and asked:
"Have you got a pen?"
A pen?!
Apparently, he wanted to give me the telephone number for my nearest Land Rover dealership!
I explained, as calmly as I possibly could, that I didn't have a pen handy because I was rather busy stopping a very heavy Land Rover, plus a horsebox, from rolling backwards down a 21% gradient into oncoming traffic!
He then asked me for my registration number so he could pass it to the dealership and see whether they had any suggestions.
By this point, I was getting rather flustered.
I explained that I couldn't remember the registration off the top of my head and that what I actually needed was somebody to attend and help control the traffic before somebody got hurt.
I wasn't asking the police to repair my Land Rover. I just wanted assistance making the situation safe!
The Police Call Back – Apparently an Old Discovery Has a Handbrake!
Approximately 15 minutes after my original emergency call, I received another telephone call from the police.
For a moment, I thought this might finally be an update on when somebody would be attending.
Unfortunately, not.
The person on the telephone explained that one of the call handlers owned an older Land Rover Discovery and that there was apparently a mechanical lever somewhere in the centre console which could be used to apply the handbrake.
Now, I'm sure the advice was well-intentioned, but I was sitting on a 21% gradient in a completely powerless 2023 Defender, with a horsebox attached, physically holding the vehicle stationary using the footbrake.
An old Discovery having a mechanical handbrake wasn't particularly helpful to me at that moment!
Trying my absolute best to remain calm, I explained yet again that my Defender does not have a conventional mechanical handbrake lever that I could simply pull.
That was the entire reason I had called 999 in the first place!
I explained that I was getting extremely concerned and was almost in a state of panic because I genuinely couldn't see a safe way of securing the vehicle.
The response?
"Have you thought about calling Land Rover to see if there's a way of applying the handbrake?"
Once again, I explained that I wasn't aware of any mechanical method of applying the parking brake on this vehicle with the electrical system completely dead.
And, more importantly, I wasn't calling the emergency services for a technical discussion about Land Rover handbrakes.
I was calling because I needed help with a potentially dangerous situation on a public road!
All I wanted was somebody to attend, help manage the passing traffic and give us a chance to make the vehicle safe.
At this point, I was beginning to feel like I was having the same conversation over and over again while still sitting with my foot firmly planted on the brake pedal.
Harry and Frank to the Rescue
Thankfully, Harry arrived with the spare battery.
We managed to connect it to the Defender, which gave us just enough electrical power to finally select Park.
What a relief that was!
Bear in mind, throughout this entire process, I'd been sitting in the driver's seat with my foot on the brake, unable to move.
Shortly afterwards, Frank arrived in his trusty old Land Rover Freelander.
We managed to unhitch the horsebox from the Defender, attach it to the Freelander, and Frank disappeared off down the road to take it safely back to my house.
One problem solved!
Unfortunately, the Defender was still very much dead.
Despite Harry bringing batteries and a jump pack, we simply couldn't get enough electrical power into the vehicle to keep everything functioning.
It would actually start, but the moment you selected Drive, the electrical load seemed to be enough to kill the entire vehicle again, leaving it back in Neutral.
Absolutely ridiculous!
Then Harry had a brainwave.
He'd arrived in his diesel Volvo, which had a decent-sized battery.
What if we took the battery off the Volvo, connected it to the Defender using jump leads, and tried to limp the remaining two miles home?
At this point, we were running out of options, so it seemed worth a try!
And Finally, the Police Arrived
While we were trying to get the Defender off the hill, we were also having to deal with passing traffic ourselves.
We'd been directing vehicles, warning drivers and trying to create enough room to unhitch and reconnect the horsebox safely.
Not exactly ideal on a busy road with a stranded vehicle and trailer!
During all of this, I'd made another two calls chasing police assistance.
Then, at 10:28am, 40 minutes after my original emergency call, my phone rang.
It was the police informing me that an officer would be with us in approximately two minutes.
And at 10:30am, the police finally arrived.
By this point, we'd already managed to get the vehicle off the hill ourselves.
42 minutes from calling 999 to the police arriving.
And here's the part that really shocked me.
We were approximately two miles from the local police station.
Now, I completely appreciate that the police have other emergencies to deal with, and I don't know what resources were available at the time.
But I genuinely thought a vehicle stranded on a hill reaching 21%, unable to engage Park or its handbrake, towing a horsebox, with the driver physically holding it in position using the footbrake, would have warranted a fairly urgent response.
Apparently not.
What concerns me most is what might have happened if it had been my wife driving.
I genuinely believe the situation could have ended in an accident, potentially involving other motorists or pedestrians.
Without Harry and Frank turning up and helping, I honestly don't know how long I would have been sitting there with my foot on the brake.
The Bigger Issue – Modern Vehicle Electronics
The whole experience has really made me question the reliance on electronics in modern vehicles.
I'm not suggesting that electronic systems are inherently unsafe, but surely there should be some way of securing a vehicle when its electrical system suffers a complete failure?
In my situation, I couldn't select Park, couldn't operate the electronic handbrake and couldn't even get out of the vehicle safely.
The Defender had effectively turned itself into a very expensive, completely immobilised lump of metal, sitting on a 21% gradient with a trailer attached.
And the only thing keeping it stationary was my right foot!
As for the police response, I still can't quite believe that, after explaining the situation, the initial suggestion was to phone a Land Rover dealership, followed by advice about a mechanical handbrake on an older Discovery.
I wasn't looking for mechanical advice. I was asking for help preventing a potentially serious road traffic accident.
A massive thank you to Harry and Frank for dropping everything and coming to help. Without them, this could have been a very different story.
So, has anybody else experienced a complete electrical shutdown in a modern Defender or Discovery, particularly where the gearbox and electronic handbrake become completely inoperable?
I'd be very interested to know whether this is a known issue and what Land Rover expects drivers to do in this situation.
Because after today's experience, I can tell you one thing.
I've never been so grateful to see an old Freelander and a diesel Volvo turn up in my life! 😂
Well, it finally happened. One of those breakdowns you always think will happen to somebody else, but never you. And what an experience it turned out to be!
So, this morning I was doing a favour for a friend, moving their horse in our new-to-me 2023 Defender 110, 3.0-litre. Nothing particularly exciting, just a short 15-minute journey with a twin-axle horsebox on the back.
Around 9am, I collected the horse, dropped it off without any problems, and stopped at the petrol station to top up before heading home.
When I started the Defender, a warning appeared on the dashboard:
"Low battery, please restart engine."
Strange, I thought, but the vehicle started and drove absolutely fine. No obvious issues, no strange noises, nothing to suggest what was about to happen.
Heading back towards my village, I started climbing a fairly steep hill, still towing the now-empty horsebox.
Now, to put this hill into perspective, the road has an average gradient of 8%, but at its steepest point, where I happened to be stranded, the gradient reaches 21%!
That's a seriously steep incline, especially when you've got a heavy 4x4 with a twin-axle horsebox attached.
And then, without any warning whatsoever, the Defender completely died.
No engine, no power, absolutely nothing!
Naturally, I applied the footbrake and attempted to select Park.
Nothing.
Tried the electronic handbrake.
Nothing.
The entire vehicle had shut itself down, leaving me sitting on a 21% gradient, with a twin-axle horsebox attached, the gearbox stuck in Neutral and my right foot being the only thing stopping the whole lot rolling backwards!
Welcome to modern motoring!
I tried everything I could think of. Turning the ignition off, locking the car, unlocking it, attempting to restart it, trying the handbrake again. Absolutely nothing worked.
By this point, traffic was passing in both directions roughly every 30 seconds, and I was beginning to realise just how serious the situation could become.
At one point, while trying to sort things out, the vehicle started rolling backwards.
I'll admit, that was a bit of a brown-trouser moment!
Time to Call for Reinforcements
I managed to call two friends.
Harry, who had access to my garage, was dispatched to collect my jump pack, some spare batteries and jump leads.
Frank, who had a towball on his Freelander, was asked to come and rescue the horsebox.
Both were around 15 minutes away.
In the meantime, I was still sitting in the Defender, foot firmly planted on the brake pedal, unable to get out, unable to select Park and unable to apply the electronic handbrake.
After several minutes of this, I decided the sensible thing to do was call 999.
The 999 Call – You Couldn't Make It Up!
At 9:48am, I called the emergency services and requested police assistance.
I explained that I was stranded on a hill with a gradient reaching 21%, towing a horsebox, with a vehicle that had suffered a complete electrical failure.
I couldn't select Park, couldn't apply the handbrake and couldn't leave the driver's seat because my foot on the brake was the only thing holding the vehicle in position.
With traffic constantly passing in both directions, I was concerned that if the vehicle rolled backwards, we could have a very serious accident.
The response?
"Just put the handbrake on."
I explained again that the Defender has an electronic handbrake and, with the electrical system completely dead, it wasn't functioning.
Again, I was told to apply the handbrake.
After explaining several times that this was physically impossible, the call handler asked me to wait.
A short while later, he returned and asked:
"Have you got a pen?"
A pen?!
Apparently, he wanted to give me the telephone number for my nearest Land Rover dealership!
I explained, as calmly as I possibly could, that I didn't have a pen handy because I was rather busy stopping a very heavy Land Rover, plus a horsebox, from rolling backwards down a 21% gradient into oncoming traffic!
He then asked me for my registration number so he could pass it to the dealership and see whether they had any suggestions.
By this point, I was getting rather flustered.
I explained that I couldn't remember the registration off the top of my head and that what I actually needed was somebody to attend and help control the traffic before somebody got hurt.
I wasn't asking the police to repair my Land Rover. I just wanted assistance making the situation safe!
The Police Call Back – Apparently an Old Discovery Has a Handbrake!
Approximately 15 minutes after my original emergency call, I received another telephone call from the police.
For a moment, I thought this might finally be an update on when somebody would be attending.
Unfortunately, not.
The person on the telephone explained that one of the call handlers owned an older Land Rover Discovery and that there was apparently a mechanical lever somewhere in the centre console which could be used to apply the handbrake.
Now, I'm sure the advice was well-intentioned, but I was sitting on a 21% gradient in a completely powerless 2023 Defender, with a horsebox attached, physically holding the vehicle stationary using the footbrake.
An old Discovery having a mechanical handbrake wasn't particularly helpful to me at that moment!
Trying my absolute best to remain calm, I explained yet again that my Defender does not have a conventional mechanical handbrake lever that I could simply pull.
That was the entire reason I had called 999 in the first place!
I explained that I was getting extremely concerned and was almost in a state of panic because I genuinely couldn't see a safe way of securing the vehicle.
The response?
"Have you thought about calling Land Rover to see if there's a way of applying the handbrake?"
Once again, I explained that I wasn't aware of any mechanical method of applying the parking brake on this vehicle with the electrical system completely dead.
And, more importantly, I wasn't calling the emergency services for a technical discussion about Land Rover handbrakes.
I was calling because I needed help with a potentially dangerous situation on a public road!
All I wanted was somebody to attend, help manage the passing traffic and give us a chance to make the vehicle safe.
At this point, I was beginning to feel like I was having the same conversation over and over again while still sitting with my foot firmly planted on the brake pedal.
Harry and Frank to the Rescue
Thankfully, Harry arrived with the spare battery.
We managed to connect it to the Defender, which gave us just enough electrical power to finally select Park.
What a relief that was!
Bear in mind, throughout this entire process, I'd been sitting in the driver's seat with my foot on the brake, unable to move.
Shortly afterwards, Frank arrived in his trusty old Land Rover Freelander.
We managed to unhitch the horsebox from the Defender, attach it to the Freelander, and Frank disappeared off down the road to take it safely back to my house.
One problem solved!
Unfortunately, the Defender was still very much dead.
Despite Harry bringing batteries and a jump pack, we simply couldn't get enough electrical power into the vehicle to keep everything functioning.
It would actually start, but the moment you selected Drive, the electrical load seemed to be enough to kill the entire vehicle again, leaving it back in Neutral.
Absolutely ridiculous!
Then Harry had a brainwave.
He'd arrived in his diesel Volvo, which had a decent-sized battery.
What if we took the battery off the Volvo, connected it to the Defender using jump leads, and tried to limp the remaining two miles home?
At this point, we were running out of options, so it seemed worth a try!
And Finally, the Police Arrived
While we were trying to get the Defender off the hill, we were also having to deal with passing traffic ourselves.
We'd been directing vehicles, warning drivers and trying to create enough room to unhitch and reconnect the horsebox safely.
Not exactly ideal on a busy road with a stranded vehicle and trailer!
During all of this, I'd made another two calls chasing police assistance.
Then, at 10:28am, 40 minutes after my original emergency call, my phone rang.
It was the police informing me that an officer would be with us in approximately two minutes.
And at 10:30am, the police finally arrived.
By this point, we'd already managed to get the vehicle off the hill ourselves.
42 minutes from calling 999 to the police arriving.
And here's the part that really shocked me.
We were approximately two miles from the local police station.
Now, I completely appreciate that the police have other emergencies to deal with, and I don't know what resources were available at the time.
But I genuinely thought a vehicle stranded on a hill reaching 21%, unable to engage Park or its handbrake, towing a horsebox, with the driver physically holding it in position using the footbrake, would have warranted a fairly urgent response.
Apparently not.
What concerns me most is what might have happened if it had been my wife driving.
I genuinely believe the situation could have ended in an accident, potentially involving other motorists or pedestrians.
Without Harry and Frank turning up and helping, I honestly don't know how long I would have been sitting there with my foot on the brake.
The Bigger Issue – Modern Vehicle Electronics
The whole experience has really made me question the reliance on electronics in modern vehicles.
I'm not suggesting that electronic systems are inherently unsafe, but surely there should be some way of securing a vehicle when its electrical system suffers a complete failure?
In my situation, I couldn't select Park, couldn't operate the electronic handbrake and couldn't even get out of the vehicle safely.
The Defender had effectively turned itself into a very expensive, completely immobilised lump of metal, sitting on a 21% gradient with a trailer attached.
And the only thing keeping it stationary was my right foot!
As for the police response, I still can't quite believe that, after explaining the situation, the initial suggestion was to phone a Land Rover dealership, followed by advice about a mechanical handbrake on an older Discovery.
I wasn't looking for mechanical advice. I was asking for help preventing a potentially serious road traffic accident.
A massive thank you to Harry and Frank for dropping everything and coming to help. Without them, this could have been a very different story.
So, has anybody else experienced a complete electrical shutdown in a modern Defender or Discovery, particularly where the gearbox and electronic handbrake become completely inoperable?
I'd be very interested to know whether this is a known issue and what Land Rover expects drivers to do in this situation.
Because after today's experience, I can tell you one thing.
I've never been so grateful to see an old Freelander and a diesel Volvo turn up in my life! 😂
I've owned some utter s
te over the years but nothing has ever ripped my trousers down like that. I'm also not given to being dramatic, but that would be gone from my ownership by Monday afternoon, what a piece of crap.
If it's battery is dying a car should (and plenty of mine have):
Tell me first if it's modern
or
Not start.
Starting fine but dropping dead at random is all kinds of not ok. Also killing your battery in less than 3 years is not ok.
te over the years but nothing has ever ripped my trousers down like that. I'm also not given to being dramatic, but that would be gone from my ownership by Monday afternoon, what a piece of crap.If it's battery is dying a car should (and plenty of mine have):
Tell me first if it's modern
or
Not start.
Starting fine but dropping dead at random is all kinds of not ok. Also killing your battery in less than 3 years is not ok.
Edited by GeniusOfLove on Saturday 24th October 15:49
Doesn't sound like fun.Hopefully one of the passing motorists at least tried to see if there was anything that they could help with? Finding a big lump of something to chock a wheel with maybe (perhaps your now defunct battery!)Or did everyone just sail past?Last year I spun round at a roundabout to check on a car stopped in an odd place. The elderly lady driver was rather scared (so the arrival of my face didn't help). But she had been there around 1 hour blocking half of a busy road - no-one had tried to help. And curiously this was 200m from a police traffic base - although appreciate possible that no-one had been in/out or was 'free' to support.[***Edit: no idea why my paragraphs get merged into one block of text***]
Edited by C-J on Saturday 24th October 16:12
Our new 110 died in a very similar way on the main dueler between Aberdeen and Dundee almost 2 years ago. It was less than 3 months old.
In a way, we were really fortunate in that there was hardly any other trafficking on the road that afternoon so were able to coast gently to a safe place to stop. Unfortunately, the reason it was so quiet is because it was Christmas Day and myself and Mrs R had just been up at her parents delivering presents and enjoying Christmas lunch. I still had most of my Santa suit on (minus the beard) and Mrs R was repentant in her Naughty Elf costume.
Landrover Assist were actually great and organised our recovery within a couple of hours (recovery guy was great despite obviously been whisked away from his family time) and to be fair a number of random passers by pulled over to check we were ok, one of whom gave us a chocolate selection box to munch on .. including a traffic cop who had the sense of fun to say Ho-Ho-Ho when I was explaining I didn t have the power to even wind down the window to speak to him.
We got recovered home on a loader, which was helpful, but when the AA arrived on Boxing Day to take the car to the Dealer the lack of any power made it impossible to bump start the car enough to let it be removed and there was talk of some sort of specialist lifting device being needed. Anyhow, after lots of head scratching they eventually took it away. We got it back 2 months later having enjoyed a Volvo XC90 for the time. I believe it took about an hour to fit the part they needed but didn t have any. Hey Ho
In a way, we were really fortunate in that there was hardly any other trafficking on the road that afternoon so were able to coast gently to a safe place to stop. Unfortunately, the reason it was so quiet is because it was Christmas Day and myself and Mrs R had just been up at her parents delivering presents and enjoying Christmas lunch. I still had most of my Santa suit on (minus the beard) and Mrs R was repentant in her Naughty Elf costume.
Landrover Assist were actually great and organised our recovery within a couple of hours (recovery guy was great despite obviously been whisked away from his family time) and to be fair a number of random passers by pulled over to check we were ok, one of whom gave us a chocolate selection box to munch on .. including a traffic cop who had the sense of fun to say Ho-Ho-Ho when I was explaining I didn t have the power to even wind down the window to speak to him.
We got recovered home on a loader, which was helpful, but when the AA arrived on Boxing Day to take the car to the Dealer the lack of any power made it impossible to bump start the car enough to let it be removed and there was talk of some sort of specialist lifting device being needed. Anyhow, after lots of head scratching they eventually took it away. We got it back 2 months later having enjoyed a Volvo XC90 for the time. I believe it took about an hour to fit the part they needed but didn t have any. Hey Ho
Edited by renmure on Saturday 24th October 16:17
GeniusOfLove said:
I've owned some utter ste over the years but nothing has ever ripped my trousers down like that. I'm also not given to being dramatic, but that would be gone from my ownership by Monday afternoon, what a piece of crap.
If it's battery is dying a car should (and plenty of mine have):
Tell me first if it's modern
or
Not start.
Starting fine but dropping dead at random is all kinds of not ok. Also killing your battery in less than 3 years is not ok.
I kind of get it because I've done the old "oh it gave a warning but it seems fine now" thing myself but "Low battery, please restart engine." probably was the sign that something wasn't right.te over the years but nothing has ever ripped my trousers down like that. I'm also not given to being dramatic, but that would be gone from my ownership by Monday afternoon, what a piece of crap.If it's battery is dying a car should (and plenty of mine have):
Tell me first if it's modern
or
Not start.
Starting fine but dropping dead at random is all kinds of not ok. Also killing your battery in less than 3 years is not ok.
Edited by GeniusOfLove on Saturday 24th October 15:49
LR really are their own worst enemy...great looking cars, handle well, lovely interiors, and best in class MPG.
I just don't get why they can't sort out their utterly awful reliability given they've had that rep for decades now. An LR should be the only choice if you want a comfy 4X4 because they're brilliant cars.
My Land cruiser is objectively worse in every metric except I know it'll start every time and everything will work...which matters more to me.
The MoD would be mad to consider the defender as the new light utility vehicle...which is a huge shame.
I just don't get why they can't sort out their utterly awful reliability given they've had that rep for decades now. An LR should be the only choice if you want a comfy 4X4 because they're brilliant cars.
My Land cruiser is objectively worse in every metric except I know it'll start every time and everything will work...which matters more to me.
The MoD would be mad to consider the defender as the new light utility vehicle...which is a huge shame.
butchstewie said:
I kind of get it because I've done the old "oh it gave a warning but it seems fine now" thing myself but "Low battery, please restart engine." probably was the sign that something wasn't right.
Low battery please restart doesn't mean "I'm going to try and get you involved in some sort of accident and murder you" though. It means the battery is a bit low, please restart the engine, which you did and which I would have done, and so would anyone else. If it had said "battery critically low, do not drive" that would have been different!
Agreed.And the displayed message was odd on all levels - surely if the battery really was low the restarting (and therefore drawing more power) is the opposite of what should be done. Of course, the battery system thinkingbit was low - v's actually being low - might be 2 different things. The latter being the system asking for a reboot - that then didn't work.
GeniusOfLove said:
Low battery please restart doesn't mean "I'm going to try and get you involved in some sort of accident and murder you" though. It means the battery is a bit low, please restart the engine, which you did and which I would have done, and so would anyone else.
If it had said "battery critically low, do not drive" that would have been different!
Yeah I can see that perspective too.If it had said "battery critically low, do not drive" that would have been different!
Easy said with hindsight I suppose but assuming no reason to suspect an actual low battery plus that legendary JLR reliability.
From when Landrover made functional durable vehicles for working, rather than to be seen in on the school run.
That will be a DC - DC converter failure. They all do that.
It s a mild hybrid, the integrated starter generator operates at 48V DC, there is no conventional 14.4V alternator to charge the 12 V battery that runs the vehicle electrical systems. Instead a DC-DC converter mounted under the boot floor converts 48V down to 14(odd) V to charge the 12 V battery. The problem is that it s not up to the job. The problem is worse in cold weather when cabin heaters, windscreen heaters, heated windscreens etc are in use the 12V system can ask for over 150A from the DC-Dc converter which is more than it was designed to deliver so it fails leaving nothing to charge the 12V battery.
Complete electrical shutdown soon follows.
https://youtu.be/ZGhJzjYabvY?is=C82CVYESBuwPponr
It s a mild hybrid, the integrated starter generator operates at 48V DC, there is no conventional 14.4V alternator to charge the 12 V battery that runs the vehicle electrical systems. Instead a DC-DC converter mounted under the boot floor converts 48V down to 14(odd) V to charge the 12 V battery. The problem is that it s not up to the job. The problem is worse in cold weather when cabin heaters, windscreen heaters, heated windscreens etc are in use the 12V system can ask for over 150A from the DC-Dc converter which is more than it was designed to deliver so it fails leaving nothing to charge the 12V battery.
Complete electrical shutdown soon follows.
https://youtu.be/ZGhJzjYabvY?is=C82CVYESBuwPponr
Edited by paralla on Saturday 24th October 17:13
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