Inoperative instrument cluster 1993 Concord

[jermanrat]

My Concord instrument cluster on occasions would malfunction. Turning off the engine and restarting use to fix the problem. I recently replaced the heater core and the engine gauges never worked since. I know I probably missed a ground wire or forgot to plug in a harness. I removed the dash again to inspect for a missing or forgotten wire, I inspected all wire harnesses for pin pushout, I installed a used instrument cluster, and recently installed a used body control module. I am looking for a wire diagram so I can inspect the wires between my instrument cluster and my PCM. I did find a grey/black wire that plugs into the left side of my instrument cluster that is not a ground or doesnt supply any voltage with the key on or off. I could really use a wire diagram or any other ideas. Any help is appreciated. Check this out. I finally purchased a wire diagram from alldata and traced out my problem. I found a data link connector on the right side of my steering columb (BLUE CONNECTOR) just under the dash. I disconnected the blue harness and all my instruments came alive. My CCD bus must have been shorted out and by disconnecting the harness fixed my problem. My transmission also downshifts properly now because this short also effected my transmission control module. I hope this can help anyone having the same type of problem because It drove me nuts.
Jerry.