BCM Body Control Module Issues (Wire harness chaffing)

[Gelf VXR]

Thought id start a new thread relevant to the title in case anyone searches later.

I just refitted headers to the car after dropping the steering rack, all was well until headlights switched off with all sorts of other electrical activity from under the dash/ steering column. I think i may have come across the issue, there seems to be an issue with the BCM wiring harness chaffing and cutting into the loom.



http://www.gtoforum.com/f3/bcm-wiring-harness-chaf...

As well as checking earth points ill be taking a look here.

[THUNDER STORM]

I presume you are talking about layout on a Monaro VXR if so I will check mine in the summer.

Ade

[mfp4073]

As we are right hand drive do we have to check under the steering column, or do we still look under the glove box on the left?

[Gelf VXR]

I've been looking under the steering column at mine this evening, i pulled open the panel and can see the fuse panel no problem, i can't see the BCM yet, may well be just an issue with the gto thou if it's in a different location

More on it here. https://kecreation.wordpress.com/2011/04/20/4/

Tonight all my lights are functioning again

[smgee]

Gelf VXR said:

I've been looking under the steering column at mine this evening, i pulled open the panel and can see the fuse panel no problem, i can't see the BCM yet, may well be just an issue with the gto thou if it's in a different location

More on it here. https://kecreation.wordpress.com/2011/04/20/4/

Tonight all my lights are functioning again

I've had my BCM out to fix a sticking relay - see instructions here:

http://www.pistonheads.com/gassing/topic.asp?t=156...

The pdf linked in that thread is for a RHD car. The BCM is mounted vertically, apparently different to the LHD pics in your link. From memory, I had to lie on my back with my head in the driver's footwell to get to it, and it's a bugger to remove.

Also worth considering that the harness chafing that affects LHD cars may not affect RHD cars.

[Gelf VXR]

Seems I may found my harness fault, got a P0158, P0156 and P0689 I've now got a short on the rear O2 signal wire in the harness with the ignition switched on, the voltage jumps about when I wiggl the harness behind the engine between the bulk head, not sure I can pull the harness out of the way after disconnecting everything.

[notransistors]

My buddies here will be interested to know that the wire rubbing issue is not just in left-hand-drive cars.

[THUNDER STORM]

Gelf VXR said:

Seems I may found my harness fault, got a P0158, P0156 and P0689 I've now got a short on the rear O2 signal wire in the harness with the ignition switched on, the voltage jumps about when I wiggl the harness behind the engine between the bulk head, not sure I can pull the harness out of the way after disconnecting everything.

Keep us updated, and possible photo, so we all can check ours from whatever you find.

Cheers mate

Ade

[Gelf VXR]

Its was just a faulty rear O2 sensor after all