Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC air delivery operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 |
Does the rear auxiliary mode valve move and the air temperature change from hot to cold? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. | Go to Step 3 |
3 |
Did the test lamp light? | -- | Go to Step 4 | Go to Step 6 |
4 |
Did the test lamp light? | -- | Go to Step 5 | Go to Step 7 |
5 | Connect a J 39200 digital multimeter (DMM) between rear auxiliary temperature valve assembly connector cavity 10 for CKT 150 (BLK) and ground. Refer to Circuit Testing in Wiring Systems. Is continuity present? | -- | Go to Step 8 | Go to Step 9 |
6 | Repair the open in CKT 341 (BRN) between the instrument panel fuse block and the front auxiliary control module. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 10 | -- |
7 | Repair the open in CKT 341 (BRN) between splice S405 and the instrument panel fuse block. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Step 10 | -- |
8 | Replace the front auxiliary HVAC control module. Refer to Auxiliary Air Conditioning (A/C) Control Assembly Replacement - Front Is the repair complete? | -- | Go to Step 10 | -- |
9 | Repair the open in CKT 150 (BLK) between splice S411 and ground G400. Refer to Wiring Repairs Is the repair complete? | -- | Go to Step 10 | -- |
10 | Operate the rear HVAC system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
