Coolant Level Indicator Lamp: Testing and Inspection

1. If the LOW COOLANT indicator comes on and the coolant level is good, remove the connector to the low coolant probe.
a. If the indicator goes out, replace the low coolant probe.
b. If the indicator stay on, remove the connector to the low coolant module.
c. If the indicator goes out, check the YEL/BLK wire from the low coolant probe to terminal F of the low coolant module connector for a short to ground. If the YEL/BLK wire is good, replace the low coolant module.
d. If the indicator stays on, remove the instrument panel and check the YEL/BLK wire for a short to ground from terminal E of the low coolant module connector to connector C2, terminal 17 of the instrument cluster.
e. If the YEL/BLK wire and all connections are good, replace the instrument panel.

2. If the LOW COOLANT indicator does not light with low coolant in the radiator, remove the connector from the low coolant probe and ground the connector.
a. If the indicator lights, replace the low coolant probe.
b. If the indicator does not light, check the bulb. If the bulb is good, go to step 3.

3. Ground terminal F of the low coolant module.
a. If the indicator now lights, locate the short in the YEL/BLK(68) wire between the probe and the module.
b. If the indicator does not light, continue to step 4.

4. Ground terminal E of the low coolant module.
a. If the indicator now lights, replace the low coolant module.
b. If the indicator does not light, remove the instrument panel and check the YEL/BLK(68) wire for an open between the module and the cluster. Also, check the flex circuit wiring behind the cluster for an open in the bulb circuit.