Anyone know the routing of wire from solenoid
Discussion
Hi Folks,
The hot start issue has now become a cold start issue where the car either wont start or only just starts (the key hits the IGN point and then there is a bit of delay before the starter fires up).
The spade connector on the wire to the solenoid (the low-amp wire) is pretty loose so I want to change that out and replace the cable run as I believe it may be heat damaged and could do with a larger cross-section anyhow to reduce volt drop to the solenoid.
Was going to just change the connector but expecting the wire to be corroded and hardly any free wire to cut back to find a clean bit before it disappears into a black conduit. Removing the starter would give more access maybe.
Thinking I will probably never be able to pull it back through the conduit so probably run a whole new cable but not sure where it originates from. Presume it is the immobiliser. Does anyone know where this cable originates from please?
The hot start issue has now become a cold start issue where the car either wont start or only just starts (the key hits the IGN point and then there is a bit of delay before the starter fires up).
The spade connector on the wire to the solenoid (the low-amp wire) is pretty loose so I want to change that out and replace the cable run as I believe it may be heat damaged and could do with a larger cross-section anyhow to reduce volt drop to the solenoid.
Was going to just change the connector but expecting the wire to be corroded and hardly any free wire to cut back to find a clean bit before it disappears into a black conduit. Removing the starter would give more access maybe.
Thinking I will probably never be able to pull it back through the conduit so probably run a whole new cable but not sure where it originates from. Presume it is the immobiliser. Does anyone know where this cable originates from please?
I've done this job, though I did it whilst replacing the big red cable from battery to starter motor too.
The best solution is not complex, but it does require a bit of reworking what's happening in the footwell, as well as routing through the bulkhead into the engine bay. There is already a grommet for that routing you can find by peeling some carpet back (possibly removing the centre console).
Part of the method is to use a piece of thin rope tied/strongly taped to the wire you're taking out, so you retain a way of following that route again. It goes over the gearbox bellhousing and is not really accessible if you haven't done this.
There is a good deal of information on what is required in this thread - my journey started on page 7.
https://www.pistonheads.com/gassing/topic.asp?h=0&...
Happy to chat through if you want.
The best solution is not complex, but it does require a bit of reworking what's happening in the footwell, as well as routing through the bulkhead into the engine bay. There is already a grommet for that routing you can find by peeling some carpet back (possibly removing the centre console).
Part of the method is to use a piece of thin rope tied/strongly taped to the wire you're taking out, so you retain a way of following that route again. It goes over the gearbox bellhousing and is not really accessible if you haven't done this.
There is a good deal of information on what is required in this thread - my journey started on page 7.
https://www.pistonheads.com/gassing/topic.asp?h=0&...
Happy to chat through if you want.
Belle427 said:
Easier to just change the wire from start to finish and eliminate the connections.
A route isn't easy really, you may want to consider adding a relay to the circuit too.
I would not worry about immobilising it to eliminate future problems.
That was my preference Belle427, just not sure where the wire originates from, i.e. where do I run the cable to to replace the old one. Presume it runs to a connector somewhere under the dashtop. I have recently replaced the alarm/immobiliser so that should be fine, just need to know where this solenoid wire originates from then I can run a replacement.A route isn't easy really, you may want to consider adding a relay to the circuit too.
I would not worry about immobilising it to eliminate future problems.
Edited by Belle427 on Friday 27th March 07:07
I can make a wire up and attach it to the solenoid but then not sure where it needs to run to inside the car. Anyone know?
Edited by taylormj4 on Sunday 29th March 15:42
Belle427 said:
It originates from the Igniton switch start terminal on a white/red cable so if replacing in its entirety it should go there.
Is that your plan?
Cheers Belle427,Is that your plan?
I was expecting it would run back to a connector for the immobiliser rather than direct to the Ignition switch. Is that not the case?
Yes, I was thinking of replacing the whole wire as I think if I cut off the spade at the solenoid, there won't be enough uncorroded wire left to make a connection to. Think it is likely the spade connector but the wire itself looks pretty small gauge and I'm getting around 1.5V drop from battery to solenoid so there's a not great joint somewhere.
It runs to the black loop back connector in the footwell.
Once you identify which one of those comes from the ignition-immobiliser, you can use that to go into a relay, then run a new connection through that relay from battery positive (add a fuse) to the starter motor solenoid.
The route is as I mentioned - through the grommet in the bulkhead, over the bell housing, between the body and the chassis spine to the starter motor.
You can see the grommet behind the engine on the nearside, then you might be able to route a wire from there, but I’m not sure how easy that will be.
I did it when taking out the old starter motor big red cable and taping/tying a thin rope to follow it into the footwell as I pulled it through.
If you’re keeping that cable, you could use the same technique but pull it back through with a new solenoid wire added to the taped/tied rope and cable bit.
Once you identify which one of those comes from the ignition-immobiliser, you can use that to go into a relay, then run a new connection through that relay from battery positive (add a fuse) to the starter motor solenoid.
The route is as I mentioned - through the grommet in the bulkhead, over the bell housing, between the body and the chassis spine to the starter motor.
You can see the grommet behind the engine on the nearside, then you might be able to route a wire from there, but I’m not sure how easy that will be.
I did it when taking out the old starter motor big red cable and taping/tying a thin rope to follow it into the footwell as I pulled it through.
If you’re keeping that cable, you could use the same technique but pull it back through with a new solenoid wire added to the taped/tied rope and cable bit.
PabloGee said:
It runs to the black loop back connector in the footwell.
Once you identify which one of those comes from the ignition-immobiliser, you can use that to go into a relay, then run a new connection through that relay from battery positive (add a fuse) to the starter motor solenoid.
The route is as I mentioned - through the grommet in the bulkhead, over the bell housing, between the body and the chassis spine to the starter motor.
You can see the grommet behind the engine on the nearside, then you might be able to route a wire from there, but I m not sure how easy that will be.
I did it when taking out the old starter motor big red cable and taping/tying a thin rope to follow it into the footwell as I pulled it through.
If you re keeping that cable, you could use the same technique but pull it back through with a new solenoid wire added to the taped/tied rope and cable bit.
Thanks PabloGee.Once you identify which one of those comes from the ignition-immobiliser, you can use that to go into a relay, then run a new connection through that relay from battery positive (add a fuse) to the starter motor solenoid.
The route is as I mentioned - through the grommet in the bulkhead, over the bell housing, between the body and the chassis spine to the starter motor.
You can see the grommet behind the engine on the nearside, then you might be able to route a wire from there, but I m not sure how easy that will be.
I did it when taking out the old starter motor big red cable and taping/tying a thin rope to follow it into the footwell as I pulled it through.
If you re keeping that cable, you could use the same technique but pull it back through with a new solenoid wire added to the taped/tied rope and cable bit.
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