Bad Ground or BCM

jpowel29

jpowel29

Member
Feb 1, 2008
780
0
16
Bentonville, Arkansas
I have my truck back up and running. Being a track only vehicle I would like gut the interior as much as possible. One small issue I would like to correct is with my dash panel lights - they don't work. The factory gauges work and I can data log the ECM and TCM with EFILive.

When I plug EFILive/Laptop into the OBDII port the dash lights come on. When unplugged they go off.

When I plug in the SnapOn Solus Scanner tool, the dash lights don't work and the factory gauges quit working. I can not connect with the BCM, clear Airbag codes, or connect/control ABS functions.

I am assuming I missed/eliminated a ground. I took out the Heat/AC, CD Player, all ductwork, dome & cargo lighting, and speakers. I left the Airbag controller hooked up and grounded. For now, both airbags are plugged in and the front impact sensor is still wired in and in working condition.

Any thoughts?
 
Chevy1925

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,638
5,778
113
Phoenix Az
jpowel29 said:
I have my truck back up and running. Being a track only vehicle I would like gut the interior as much as possible. One small issue I would like to correct is with my dash panel lights - they don't work. The factory gauges work and I can data log the ECM and TCM with EFILive.

When I plug EFILive/Laptop into the OBDII port the dash lights come on. When unplugged they go off.

When I plug in the SnapOn Solus Scanner tool, the dash lights don't work and the factory gauges quit working. I can not connect with the BCM, clear Airbag codes, or connect/control ABS functions.

I am assuming I missed/eliminated a ground. I took out the Heat/AC, CD Player, all ductwork, dome & cargo lighting, and speakers. I left the Airbag controller hooked up and grounded. For now, both airbags are plugged in and the front impact sensor is still wired in and in working condition.

Any thoughts?
Click to expand...

If you took the headlight/dome light control out of the dash, it can cause you issues like this
 
jpowel29

jpowel29

Member
Feb 1, 2008
780
0
16
Bentonville, Arkansas
Finally found some good schematics. Added/Replaced two grounds and that just about fixed all the problems. Still reviewing some more.

Can't wait until a good stand alone ECM is available and at least somewhat economical for purpose built DMax applications.
 
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