Instrument Cluster C1 & C2 Connector Pin Test

1. Place ignition switch in "RUN" position (except for resistance measurements). Make all resistance measurements to ground with negative battery cable disconnected.
2. Make all measurements to ground unless a specific terminal number is given. If correct voltage or resistance is found at a terminal, check circuit for malfunction using appropriate test. See Fig 1 and Fig 2 .
3. If correct voltage or resistance is found at terminals, and the function that uses those terminals is incorrect, check instrument cluster printed circuit and bulbs. If printed circuit and bulbs are okay, replace the instrument cluster.

Fig 1: Instrument Cluster C1 Connector Pin Test

Courtesy of GENERAL MOTORS CORP.

Fig 2: Instrument Cluster C2 Connector Pin Test

Courtesy of GENERAL MOTORS CORP.