1. Remove the low engine coolant level indicator switch harness connector.
2. Use a J39200 DMM from the low engine coolant level indicator switch from terminal B to chassis ground.

Does the DMM indicate continuity?

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Go to Step 2

Go to Step 3

1. Connect a fused jumper from low engine coolant level indicator switch harness connector terminal B to A.
2. Turn the ignition switch to RUN.
3. Observe the lamp.

Does the lamp turn on?

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Go to Step 4

Go to Step 5

Repair the open in CKT 150 (BLK) between the low engine coolant level indicator switch and the ground.

Is the low coolant lamp operative?

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System OK

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Replace the low coolant level indicator switch.

Is the low coolant lamp operative?

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System OK

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1. Leave the jumper connected.
2. Backprobe the multifunction alarm module with a test lamp from terminal B to B+.

Did the test lamp light?

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Go to Step 6

Go to Step 7

1. Turn the ignition switch to LOCK.
2. Disconnect the fused jumper between terminals A and B of the harness connector.
3. Disconnect the multifunction alarm module.
4. Connect a fused jumper from multifunction alarm module harness connector terminal B2 to B+
5. Observe the lamp.

Does the lamp light?

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Go to Step 8

Go to Step 9

Repair the open in CKT 1478 (LT GRN) between the low engine coolant level indicator switch and the multifunction alarm module.

Is the low coolant lamp operative?

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System OK

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Replace the multifunction alarm module.

Is the low coolant lamp operative?

--

System OK

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Repair the open in CKT 68 (YEL/BLK) between the driver information center and the multifunction alarm module.

Is the low coolant lamp operative?

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System OK

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