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Old 11-21-2018, 07:31 AM   #1
theheder
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theheder has no rep around here.
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!
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Last edited by theheder; 11-21-2018 at 07:39 AM..
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Old 01-15-2019, 05:33 AM   #2
robertmee
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robertmee is actually making some sense.robertmee is actually making some sense.
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.
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