Temperature Gauge: Testing and Inspection

1. Check No. 13 (10A) fuse in under dash fuse/relay box before testing.
2. Ensure ignition switch is in Off position, then disconnect red or yellow/green wire from coolant temperature sending unit and ground it with a jumper wire.
3. Turn ignition switch to On position.
4. Check as needle of coolant temperature gauge starts moving toward H mark. Turn ignition switch to Off position before pointer reaches H mark on gauge dial. Failure to do so may damage gauge.
5. If pointer of gauge does not move, check the following:
a. Blown fuse in under dash fuse/relay box.
b. Open in yellow/green wire, yellow or red wire.
c. If fuse and wiring are satisfactory, replace coolant temperature gauge.
6. If gauge is satisfactory, inspect sending unit.