Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the HVAC Blower Controls System Check | -- | Go to Step 2 | |
2 |
Did the test lamp light? | -- | Go to Step 3 | Go to Step 4 |
3 | Connect a test lamp between CKT 1596 (GRY/BLK) terminal A and CKT 850 (BLK) terminal B at the heater and A/C control valve solenoid. Did the test lamp light? | -- | Go to Step 5 | Go to Step 6 |
4 | Use a test lamp in order to backprobe from the rear heater switch CKT 1596 (GRY/BLK) terminal C to ground while moving the rear heater switch between LOW, MEDIUM, and HIGH. Did the test lamp light in all of the settings? | -- | Go to Step 7 | Go to Step 8 |
5 |
Does any restrictions or damage exist? | -- | Go to Step 9 | Go to Step 10 |
6 | Repair the open in CKT 850 (BLK) between the heater and A/C control valve solenoid and splice S108. Is the repair complete? | -- | -- | |
7 | Repair the open in CKT 1596 (GRY/BLK) between the rear heater switch and the heater and A/C control valve solenoid. Is the repair complete? | -- | -- | |
8 | Inspect for a poor connection at the rear heater switch. Did you find a poor connection? | -- | Go to Step 14 | Go to Step 11 |
9 | Repair or replace the vacuum supply hose as necessary. Is the repair complete? | -- | -- | |
10 |
Do any problems exist? | -- | Go to Step 12 | Go to Step 13 |
11 | Replace the rear heater switch. Refer to Control Switch Replacement - Auxiliary in Heating and Ventilation (Non-A/C). Is the replacement complete? | -- | -- | |
12 | Repair the damage as necessary. Is the repair complete? | -- | -- | |
13 | Replace the heater and A/C control valve solenoid. Is the replacement complete? | -- | -- | |
14 | Repair the poor connection. Is the repair complete? | -- | -- |
