Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC system operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 | Verify that the blower motor high speed is inoperative. Does the blower motor operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the test lamp light? | -- | Go to Step 7 | Go to Step 4 |
4 | Connect a test lamp between heater and A/C controller connector C4 cavity A and ground. Does the test lamp light? | -- | Go to Step 5 | Go to Step 6 |
5 | Repair the open in CKT 52 (ORN). Is the repair complete? | -- | Go to Step 16 | -- |
6 | Replace the heater and A/C controller. Refer to Control Assembly Replacement . Is the replacement complete? | -- | Go to Step 16 | -- |
7 | Connect a test lamp between blower motor relay connector cavity 86 (CKT 52) and cavity 85 (CKT 850). Does the test lamp light? | -- | Go to Step 9 | Go to Step 8 |
8 | Repair the open in CKT 850 (BLK) between the blower motor relay and S118. Is the repair complete? | -- | Go to Step 16 | -- |
9 | Connect a fused jumper wire to blower motor relay connector cavity 87 (CKT 540) and cavity 30 (CKT 65). Does the blower motor operate? | -- | Go to Step 10 | Go to Step 11 |
10 | Replace the blower motor relay. Is the replacement complete? | -- | Go to Step 16 | -- |
11 | Inspect the HVAC fuse in the underhood fuse block. Is the fuse open? | -- | Go to Step 13 | Go to Step 12 |
12 | Repair the open or high resistance in CKT 540 (ORN). Is the repair complete? | -- | Go to Step 16 | -- |
13 |
Does the circuit breaker cycle? | -- | Go to Step 14 | Go to Step 15 |
14 |
Is the repair complete? | -- | Go to Step 16 | -- |
15 |
Is the repair complete? | -- | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
