Quote:
|
Originally Posted by GMMerlin
Your concern is not with a shorted wire, but most likely a bad or open ground. With the information presented in regards to previous work, most likely the ground is loose.
Lets start at the beginning. The wire (Red/Blk) is the Low Reference wire from the ICM to the PCM. A Low Ref is a ground supplied by a module..in this case, the PCM supplies a ground for the ICM. There is also a chassis ground for the ICM that bolts right under the coil/module assembly on the bracket.
Since you state that this started right after the Trans was replaced, I would check the ground for the PCM that bolts to the Left front side of the trans bellhousing near the starter.
It is possible that this is loose or not installed and the PCM is trying to find a ground path thru the ICM on the Low Reference wire.
Since the Low Ref is a .35 mm wire and the PCM has 4 grounds that splice into the .8mm wire to the trans, the Low ref is overheating causing the insulation to melt off of it.
Also check the battery ground at the trans also.
|
Thank you for the advice, you were right on the money. The ground wire on the trans bell housing was not re-connected properly.
I took the car back to the dealer who replaced the trans and showed them the problem, they apologised for the trouble they had caused and replaced the burned out wire and tightened up the ground wire.
The car is running great again.
Thanks
Regards
Terry