Tachometer Inoperative/Inaccurate: Testing
WARNING: This page is about a different car, the 1998 Cadillac Eldorado and 1998 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Connect scan tool. Check for DTCs. If any DTCs exist, diagnose and repair as necessary. See SELF-DIAGNOSTIC - SYSTEM . If no DTCs exist, check for open or short in White wire between IPC Blue 24-pin connector C1, terminal A5 and PCM Clear 80-pin connector C2, terminal No. 28. Repair as necessary. Recheck system operation.