Wiring experts?

theheder · 11-21-2018, 07:31 AM

Any wiring harness pros out there?

I'm only getting 2.6 volts on the communication wires (3 tan/1 tan with a black stripe) on my 6L90 Trans TCM.
It's stuck in limp mode (3rd gear) and throwing all kinds of trans DIC messages.

I have test hung a known good TCM and it does the same thing.

I traced and cleaned up all of the grounds that I could find.

I have the harness half way pulled out to check for damage, but can't seem to find anything.

Any suggestions or recommendations are welcome!!!

Thanks!

robertmee · 01-15-2019, 05:33 AM

There appears to be several points of connectors. Something is potentially drawing down the voltage, so I would start disconnecting things to see if the voltage returns.

11-21-2018, 07:31 AM	#1
theheder Registered User Join Date: May 2015 Location: Clayton NC Posts: 460	Wiring experts? Any wiring harness pros out there? I'm only getting 2.6 volts on the communication wires (3 tan/1 tan with a black stripe) on my 6L90 Trans TCM. It's stuck in limp mode (3rd gear) and throwing all kinds of trans DIC messages. I have test hung a known good TCM and it does the same thing. I traced and cleaned up all of the grounds that I could find. I have the harness half way pulled out to check for damage, but can't seem to find anything. Any suggestions or recommendations are welcome!!! Thanks! __________________ "Only those who will risk going too far can possibly find out how far one can go." - T. S. Eliot Last edited by theheder; 11-21-2018 at 07:39 AM..

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01-15-2019, 05:33 AM	#2
robertmee Registered User Join Date: Apr 2010 Location: Raleigh Posts: 282	There appears to be several points of connectors. Something is potentially drawing down the voltage, so I would start disconnecting things to see if the voltage returns.