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 |
Does the test lamp light? | -- | Go to Step 3 | Go to Step 5 |
3 | Connect a test lamp between B+ and circuit 363 (TAN) at the heater-A/C control connector C2, terminal A7. Does the test lamp light? | -- | Go to Step 4 | Go to Step 6 |
4 | Locate and repair a short to ground on circuit 363 (TAN) between the vacuum/electric solenoid harness connector terminal 4 and the heater-A/C control connector C2, terminal A7. Refer to Testing for Short to Ground and Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 7 | -- |
5 | Replace the vacuum/electric solenoid module. Refer to Vacuum Electrical Solenoid Replacement in Heating, Ventilation, and Air Conditioning. Is the repair complete? | -- | Go to Step 7 | -- |
6 | Replace the Heater-A/C Control Assembly. Refer to Control Assembly Replacement . Is the repair complete? | -- | Go to Step 7 | -- |
7 | Verify that the system operates properly. Does the system operate properly? | -- | System OK | Go to Symptoms |
