Caravan AWD V6-201 3.3L (1991)
Tachometer: Testing and Inspection
1. Remove instrument cluster.
2. with ignition switch in On position, check for battery voltage at cavity "F" of instrument cluster right side (black) connector and cavity "A" of
instrument panel cluster left side (red) connector.
3. Check cavity "H" of instrument cluster left side connector for continuity to ground.
4. Check for tachometer signal from the engine controller by connecting an AC Digital Voltmeter to cavity "D" of the black instrument cluster
connector and ground. A minimum of 1 volt should be present with engine running.
5. If there is less than 1 volt present in above step, check for continuity between cavity "D" of instrument cluster and pin 43 of engine controller
connector. If there is no continuity, repair wire as required. Also check connector at engine controller for damaged pins or terminal push outs.
6. If voltage reading from step 5 is less than 1 volts and no continuity between cavity "D" and pin 43 is evident, replace the engine controller.
7. If above tests are correct, replace the tachometer drive module.
8. If tachometer continues to be inoperable, replace the tachometer assembly.
