Instrument Panel Internal Resistance Checks

Instrument Panel View:

Diagnostic Chart:

Before replacing a cluster gage the following steps must be followed to determine whether the suspect gage or the flex printed circuit board (PCB) is the cause of the complaint.

1. Perform all checks listed for the suspect gage. Checks should be made across the cluster (removed from vehicle and face down on the anti-static mat) between the connector - cavities listed in the chart. Fuel and coolant temperature gage checks should be made between the metal clips that connect the gage, to the flex PCB (labeled FUEL, TEMP, IGN, and GRD) and the specified connector - cavity.

2. The measured resistance for all checks should be equal to or less than 1.0 Ohm.

3. If any of the resistance checks are above the specified range the back housing should be replaced instead of the suspect gage.

C1 - Flex PCB tabs which connect to the natural 18-way connector of the I/P harness.

C2 - Flex PCB tabs which connect to the black 18-way connector of the I/P harness.

C3 - Black 4-way connection crimped to the flex and connected to the tachometer circuit board.

C4 - Black 18-way connection crimped to the flex and connected to the speedometer/odometer circuit board.