Defoggers Are Always ON
Step
| Action
| Value(s)
| Yes
| No
|
1
|
- Disconnect the rear window defogger relay.
- Turn the ignition switch to the RUN position.
- 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 4
| Go to
Step 2
|
2
| 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 7
| Go to
Step 3
|
3
|
- Replace the rear window defogger relay.
- Inspect the system again.
Is the repair complete?
| --
| System OK
| --
|
4
| Inspect for a short to ground in CKT 193 (WHT).
Is there a short to ground on the circuit?
| --
| Go to
Step 5
| Go to
Step 6
|
5
|
- Repair the short to ground in CKT 193 (WHT).
- Inspect the system again.
Is the repair complete?
| --
| System OK
| --
|
6
|
- 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?
| -
| System OK
| -
|
7
|
- Keep the test lamp connected in the same place.
- Remove the HEATED MIRROR fuse from the fuse block.
Does the test lamp light?
| --
| Go to
Step 8
| Go to
Step 9
|
8
|
- Repair a short to B+ in CKT 293 (PPL).
- Inspect the system again.
Is the repair complete?
| --
| System OK
| --
|
9
|
- Repair a short to B+ in CKT 267 (ORN).
- Inspect the system again.
Is the repair complete?
| --
| System OK
| --
|
