Was the System Operation reviewed?

--

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 in order to probe between B+ and the rear window defogger relay connector terminal A 1 (CKT 193).

Does the test lamp light?

--

Go to Step 5

Go to Step 3

Use a test lamp in order to probe between the rear window defogger relay connector terminal A 2 (CKT 293) and ground.

Does the test lamp light?

--

Go to Step 8

Go to Step 4

1. Replace the rear window defogger relay.
2. Inspect the system again.

Is the repair complete?

--

Go to Step 11

--

Inspect for a short to ground in CKT 193 (WHT).

Is there a short to ground on the circuit?

--

Go to Step 6

Go to Step 7

1. Repair the short to ground in CKT 193 (WHT).
2. Inspect the system again.

Is the repair complete?

--

Go to Step 11

--

Replace the heater-a/c control. Refer to Control Assembly Replacement for the manual HVAC system or refer to Control Assembly Replacement for the Automatic HVAC system.

Is the repair complete?

-

Go to Step 11

-

1. Keep the test lamp connected in the same place.
2. Remove the HEATED MIRROR fuse from the fuse block.

Does the test lamp light?

--

Go to Step 9

Go to Step 10

Repair a short to B+ in CKT 293 (PPL).

Is the repair complete?

--

Go to Step 11

--

Repair a short to B+ in CKT 267 (ORN).

Is the repair complete?

--

Go to Step 11

--

Verify that the system operates properly.

Does the system operate properly?

--

System OK

Go to Symptoms