1

Did you review the Defogger Symptoms Check?

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Go to Step 2

Go to Symptoms

1. Disconnect the rear window defogger relay.
2. Turn the ignition switch to the RUN position.
3. Use a test lamp to probe between B+ and the rear window defogger relay connector terminal A1 (circuit 193).

Does the test lamp light?

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Go to Step 5

Go to Step 3

Use a test lamp in order to probe between the rear window defogger relay connector terminal A2 (circuit 293) and ground.

Does the test lamp light?

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Go to Step 8

Go to Step 4

Replace the rear window defogger relay.

Is the repair complete?

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Go to Step 9

Go to Step 3

Inspect for a short to ground in circuit 193 (WHT). Refer to Testing for Short to Ground in Wiring Systems.

Did you find a short to ground on the circuit?

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Go to Step 6

Go to Step 7

1. Repair the short to ground in circuit 193 (WHT). Refer to Wiring Repairs in Wiring Systems.
2. Inspect the system again.

Is the repair complete?

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Go to Step 9

Go to Step 5

Replace the Heater-A/C Control. Refer to one of the following procedures:

Is the repair complete?

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Go to Step 9

Go to Step 5

Repair a short to B+ in circuit 293 (PPL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 9

Go to Step 3

Verify that the system operates properly.

Does the system operate properly?

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Go to Symptoms

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