Instrument Panel Cluster Internal Resistance Checks

Instrument Panel Cluster Internal Resistance Checks (Part 1 Of 2):

Instrument Panel Cluster Internal Resistance Checks (Part 2 Of 2):

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 below 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 below. 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 GND) 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 backhousing should be replaced instead of the suspected gage.

Below is a definition of the connector designation used in the table above. (Refer to cluster view for locations.)
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

Once the malfunctioning component has been identified, refer to the removal and installation procedures.