Never trust a programmer....
Discussion
... wth a Screwdriver in his hands"
Is one of the oldest jokes in IT (back when it was called DP - which means summat quite different in this Day and Age
)
However, I am Sick to Death of the lack of access to The Big Fuse (TBF) and have decided to move it.
Many thanks go out to Gordon for his genius ideas
BUT
Before I start to drill into bodywork etc, I just wanted to confirm with you Electrician Genii that
The Fuse Holder doesn't need to be anchored (earthed) to metal does it ????
I am thinking of moving it to either nearer the Battery or (eventually) into the Passenger's Glove Box.
As a test to my plan I'm gonna try and start the motor with TBF hanging, suspended only by the strength of it's own cables.
Can anyone foresee a problem ??
Thanks for any insults that you can throw my way
PJ
Is one of the oldest jokes in IT (back when it was called DP - which means summat quite different in this Day and Age
)However, I am Sick to Death of the lack of access to The Big Fuse (TBF) and have decided to move it.
Many thanks go out to Gordon for his genius ideas
BUT
Before I start to drill into bodywork etc, I just wanted to confirm with you Electrician Genii that
The Fuse Holder doesn't need to be anchored (earthed) to metal does it ????
I am thinking of moving it to either nearer the Battery or (eventually) into the Passenger's Glove Box.
As a test to my plan I'm gonna try and start the motor with TBF hanging, suspended only by the strength of it's own cables.
Can anyone foresee a problem ??
Thanks for any insults that you can throw my way
PJ
Hi,
The fuse holder itself is insulated from the engine, so it can be mounted wherever you like within reason. I've got one mounted on the injector rail (4.2 V8) using a sliver of wood to provide heat insulation after it partially melted on a hot day. Mine uses those 'mega-fuses' rather than the original pressed metal type, but having it accessible is a good modification.
Simon
The fuse holder itself is insulated from the engine, so it can be mounted wherever you like within reason. I've got one mounted on the injector rail (4.2 V8) using a sliver of wood to provide heat insulation after it partially melted on a hot day. Mine uses those 'mega-fuses' rather than the original pressed metal type, but having it accessible is a good modification.
Simon
Paul, Thanks for the kind words.
As Simon says :-) - it can pretty much go anywhere, but I would think first of the cable runs. If you want to take it inside the cab you're going to need to route 3 heavy cables through the bulkhead into the cab. Do-able, but probably messy. Also, it you move it closer to the battery you'll have one short cable form battery to the fuse, then 2 longer ones going to the starter and the alternator - both needing to be insulated from the heat of the exhaust. Again, no real problem, but still a bit messy.
In actual fact, the current position is probably optimal for cable runs, except I would take the cable from the battery to one side of the fuse and then from the same terminal on the fuse run a short cable to the starter. The other side of the fuse goes to the alternator. The factory run uses the starter as the connection terminal for the battery and fuse, which make it awkward to access.
The biggest problem with the factory install is the cheap fuse and holder. The simplest solution would be to leave the position alone, (or move it vertically up) but uprate the fuse and holder to a more durable model and a to mega fuse. I've found that all fails of my original fuse were NOT electrical, but mechanical failures - so a sturdier item should last as long as the rest of the car.
Gordon
As Simon says :-) - it can pretty much go anywhere, but I would think first of the cable runs. If you want to take it inside the cab you're going to need to route 3 heavy cables through the bulkhead into the cab. Do-able, but probably messy. Also, it you move it closer to the battery you'll have one short cable form battery to the fuse, then 2 longer ones going to the starter and the alternator - both needing to be insulated from the heat of the exhaust. Again, no real problem, but still a bit messy.
In actual fact, the current position is probably optimal for cable runs, except I would take the cable from the battery to one side of the fuse and then from the same terminal on the fuse run a short cable to the starter. The other side of the fuse goes to the alternator. The factory run uses the starter as the connection terminal for the battery and fuse, which make it awkward to access.
The biggest problem with the factory install is the cheap fuse and holder. The simplest solution would be to leave the position alone, (or move it vertically up) but uprate the fuse and holder to a more durable model and a to mega fuse. I've found that all fails of my original fuse were NOT electrical, but mechanical failures - so a sturdier item should last as long as the rest of the car.
Gordon
Whilst the big fuse is a pain to get to it (along with the silver key) is blamed for all sorts of stuff it cannot possibly affect. It sits between the alternator and the battery. If it breaks the battery wont charge, and the rev counter wont work. That's it. Of course there may be secondary effects as the result of a low battery as it discharged after alternator/big fuse failure but if your car wont start or has other weird issues with a charged battery, it's not the big fuse.
The silver key's mythical powers are simply limited to providing an earth for the ignition control box too.
I must admit, I've gone through the faff of alternator failure twice now and in hope more than expectation I checked the big fuse both times so if anyone wants to relocate it for ease of access I totally understand. It also turns out that not all alternators are made the same. Some are evidently crap as one (quite possibly original) failed after 80k miles or so (if original). The 2nd has made it maybe 2000 miles. Got 1 from Denso on order now, here's hoping it does better.
The silver key's mythical powers are simply limited to providing an earth for the ignition control box too.
I must admit, I've gone through the faff of alternator failure twice now and in hope more than expectation I checked the big fuse both times so if anyone wants to relocate it for ease of access I totally understand. It also turns out that not all alternators are made the same. Some are evidently crap as one (quite possibly original) failed after 80k miles or so (if original). The 2nd has made it maybe 2000 miles. Got 1 from Denso on order now, here's hoping it does better.
Edited by CerbWill on Wednesday 7th April 19:20
Matt, this is the fuse holder I user.
https://www.pcscables.co.uk/2126-snmega-waterproof...
Also got the fuse from the same source + new battery cables etc. There's a link to some pics in Pauls original post.
https://www.pcscables.co.uk/2126-snmega-waterproof...
Also got the fuse from the same source + new battery cables etc. There's a link to some pics in Pauls original post.
) .notaping said:
Matt, this is the fuse holder I user.
https://www.pcscables.co.uk/2126-snmega-waterproof...
Also got the fuse from the same source + new battery cables etc. There's a link to some pics in Pauls original post.
Awesome, many thanks. https://www.pcscables.co.uk/2126-snmega-waterproof...
Also got the fuse from the same source + new battery cables etc. There's a link to some pics in Pauls original post.
Matt
Often wonder how many cars have suffered a blown 100 Amp fuse
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of b
ks
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of b
ks
Penelope Stopit said:
Often wonder how many cars have suffered a blown 100 Amp fuse
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of bks
Pen,,,,,,as it happens, the 100A fuse has fractured on my last 2 TVRs.There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of b
ksOn the Chimaera, just noticed a faint glow on the dash warning light driving from work to my local sports centre. Came out, and battery flat, had to 'phone the missus! Having phoned around, one of the 'spares' folks sent me a new strip fuse in the post...Grovel under the car - sure enough when I undid the M4 nuts, the fuse fell apart - but on first inspection, it looked intact.
On my current Tuscan, 7 years ago, driving through Dorset to a friend's house in Wilts, exactly the same - very faint glow on dash warning light. Replaced fuse with midi type which is still going strong.
Nick
Penelope Stopit said:
Often wonder how many cars have suffered a blown 100 Amp fuse
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of bks
Pen,,,,,,as it happens, the 100A fuse has fractured on my last 2 TVRs.There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of b
ksOn the Chimaera, just noticed a faint glow on the dash warning light driving from work to my local sports centre. Came out, and battery flat, had to 'phone the missus! Having phoned around, one of the 'spares' folks sent me a new strip fuse in the post...Grovel under the car - sure enough when I undid the M4 nuts, the fuse fell apart - but on first inspection, it looked intact.
On my current Tuscan, 7 years ago, driving through Dorset to a friend's house in Wilts, exactly the same - very faint glow on dash warning light. Replaced fuse with midi type which is still going strong.
Nick
WIL35 said:
The what?? Is the Glove Box a later model development?
Oops, Sorry Mate. I should have qualified that as "my future, intended Glove Box".That's my plan, once I've set up the permanent ECU monitor ...etc...etc...
WIL35 said:
Yup, it's starting to look like several peeps were as annoyed as I am - YeeeHaaa !! 
WIL35 said:
Mr Cerbera said:
Oops, Sorry Mate. I should have qualified that as "my future, intended Glove Box".
That's my plan, once I've set up the permanent ECU monitor ...etc...etc...
Aww, that's a shame. I really need somewhere to put my gloves and that would have been ideal.That's my plan, once I've set up the permanent ECU monitor ...etc...etc...
If I ever do it, I'll be selling the Kit on my ever-expanding list of "Cervera Inprovement Packs" which
I will be flooding the market with
Penelope Stopit said:
Often wonder how many cars have suffered a blown 100 Amp fuse
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of bks
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of b
ks
I’m now a fully paid up member of The 100A fuse is
club!MattPlaneCrank said:
OMG I just checked the location the fuse should be in and there’s a suspicious chunk of gaffer tape in it’s place. The fuse has been relocated but is just loose and not in good condition. I’ll investigate further when I haven’t just had a couple of pints of excellent local ale.
Matt
MattPlaneCrank said:
Feeling for you MattPlaneCranknawarne said:
Penelope Stopit said:
Often wonder how many cars have suffered a blown 100 Amp fuse
There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of bks
Pen,,,,,,as it happens, the 100A fuse has fractured on my last 2 TVRs.There are many posts to this forum regarding failed/broken fuses, have not come across topics about blown fuses
There's a reason for the lack of topics about blown 100 Amp fuses, it being that the fuse is protecting a short length of cable
As long as good sleeving and fasteners are used to protect the run of the alternator main positive supply there won't be a problem (Yes I know what happened to the Titanic)
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Alternators can short to earth at the main positive terminal if its insulation is damaged due to incorrectly tightening the cables eyelet terminal onto it, even then it's not easily done with a Cerbera alternator that has a massive insulator plate
Manufacturers fuse certain circuits to cover themselves from liability due to them having no say in what goes on with their vehicles once they have left the factory
Not meaning to offend with what some class as bad language.........................................................The 100 Amp fuse is a load of b
ksOn the Chimaera, just noticed a faint glow on the dash warning light driving from work to my local sports centre. Came out, and battery flat, had to 'phone the missus! Having phoned around, one of the 'spares' folks sent me a new strip fuse in the post...Grovel under the car - sure enough when I undid the M4 nuts, the fuse fell apart - but on first inspection, it looked intact.
On my current Tuscan, 7 years ago, driving through Dorset to a friend's house in Wilts, exactly the same - very faint glow on dash warning light. Replaced fuse with midi type which is still going strong.
Nick
Will you be joining the 100 Amp Fuse Is **** Club? https://www.pistonheads.com/gassing/topic.asp?h=0&...
Penelope Stopit said:
Alternators don't easily short to earth, if a diode goes short circuit it will not remain short circuit as it will burn out before overloading the heavy duty supply cable
Unless it is a fuse, you can't rely on it acting like a fuseIn my day job I once realised that tens of thousands of products had gone out the door relying on a motor burning out in the event of failure. We got 5 new motors and stalled each till failure. Four of them blew within seconds. The 5th got to over 500 degrees before catching fire. Cue product recall and the installation of a thermal cutout...
A lot of alternators come with internal fuses. Our Denso units don't and need that external fuse. So said Denso themselves when I asked. Yes it's fantastically unlikely, but it *is* predictable and so must be mitigated. That's engineering.
They fail all too often because of the terminals not maintaining a tight clean connection and generate enough heat as the resistance builds up to melt the fuse. The failure will look exactly the same as a blown fuse. The difference will be that it failed well below the 100A rating of the fuse. Uprating the fuse will not help, other than through a proper installation with clean contacts. QED
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