Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 |
Did the rear heater blower motor stop running? | -- | Go to Step 3 | Go to Step 4 |
3 | Replace the rear heater switch. Refer to Control Switch Replacement - Auxiliary in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 9 | -- |
4 | Disconnect the rear heater resistor pack. Did the rear heater blower motor stop running? | -- | Go to Step 5 | Go to Step 6 |
5 | Connect a test lamp between the rear heater switch CKT 1925 (RED) cavity A to ground. Does the test lamp illuminate? | -- | Go to Step 7 | Go to Step 8 |
6 | Repair the short to voltage in CKT 1924 (WHT) or CKT 1172 (YEL). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | -- |
7 | Repair the short to voltage in CKT 1925 (RED). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | -- |
8 | Repair the short to voltage in CKT 1926 (DK BLU). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
