Mean Green z28

iTrader: (17)

Trying to figure out what the hell's the issue with a '00 T/A. Most all the functions on the cluster (RPM, fuel gauge, coolant temp, etc.) that work off the Class-II serial data line from the PCM only work intermittently. I've traced the wires from the PCM all the way to the cluster and I have continuity. I'm just wondering if it's a grounding issue. If someone has the ground distribution schematics or some other way of tracing this issue, I'd really appreciate the help ... Everything else works fine and the car runs strong. My Haynes service manual doesn't have this info. or grounding locations.

shoemike

iTrader: (25)

This is all I have on the IPC, hope it helps.


LS1 Ground Locations.doc

Mean Green z28

iTrader: (17)

thanks!!!!

Mean Green z28

iTrader: (17)

Ended up paying for an Alldata subscription and after tracing everything, it ended up being the thing I expected the least ... it ended up being the EBCM that was shorted out inside and was backfeeding the entire car ... ugh!

shoemike

iTrader: (25)

Yikes!