Mean Green z28
07-30-2009, 10:17 PM
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.