Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: The rear defogger does not operate when the rear defogger button is pressed. | ||||
1 | Were you sent here from the defogger system check? | -- | Go to Step 2 | Go to Defogger System Check . |
2 |
Is the request for the rear defogger displayed on the scan tool? | -- | Go to Step 3 | Go to Step 6 |
3 | Using the scan tool, command the defogger relay on. Did the relay click? | -- | Go to Step 4 | Go to Step 7 |
4 | Measure the voltage at terminal A of the rear window defogger. Refer to Measuring Voltage in Wiring Systems. Is the voltage within the specified value? | 10.5-15 V | Go to Step 8 | Go to Step 5 |
5 | Measure the voltage to terminal C5 connector C3 of the underhood junction block and ground. Refer to Measuring Voltage in Wiring Systems Is the voltage a specified value? | 10.5-15 V | Go to Step 9 | Go to Step 10 |
6 | Inspect for a loose connection at the Rear Integration Module (RIM). If terminal contact is OK, Replace the RIM. Refer to Body Control Module Replacement in Body Control Systems. Is the repair complete? | -- | Go to Step 12 | -- |
7 | Measure resistance of the RR Defog relay. Refer to Testing for Continuity in Wiring Systems. Is resistance within the specified value? | 8090 ohms | Go to Step 8 | Go to Step 10 |
8 | Repair open in CKT 193 (WHT). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 12 | -- |
9 | Repair the rear window defogger ground. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 12 | -- |
10 | Repair open in CKT 293 (PPL). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 12 | -- |
11 | Replace the RR DEFOG relay? Is the repair complete? | -- | Go to Step 12 | -- |
12 | Confirm proper operation of the rear window defogger. Is the rear defogger operating correctly? | -- | System OK | -- |
