Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |
2 | Exchange the blower motor relay with a known good relay from the underhood wiring harness junction block. Does the blower motor operate? | -- | Go to Step 3 | Go to Step 4 |
3 | Replace the faulty relay. Is the repair complete? | -- | System OK | -- |
4 | Backprobe the underhood wiring harness junction block connector C3 using a fused jumper between terminal B9 and B+. Does the blower motor operate? | -- | Go to Step 10 | Go to Step 5 |
5 |
Does the test lamp light? | -- | Go to Step 6 | Go to Step 7 |
6 | Connect a test lamp between terminal A and terminal B of the blower motor connector. Does the test lamp light? | -- | Go to Step 8 | Go to Step 9 |
7 | Repair the open in CKT 65 between the underhood wiring harness junction block and the blower motor. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | System OK | -- |
8 | Replace the blower motor. Refer to Blower Motor and Fan Replacement . Is the repair complete? | -- | System OK | -- |
9 | Repair the open in CKT 250 between the blower motor and ground splice pack G203. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | System OK | -- |
10 |
Does the voltage measured equal the specified value? | B+ | Go to Step 14 | Go to Step 11 |
11 |
Does the voltage measured equal the specified value? | B+ | Go to Step 12 | Go to Step 13 |
12 | Repair the open in CKT 641 between the right side IP wiring harness junction block and the heater A/C control assembly. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | System OK | -- |
13 | Replace the right side IP wiring harness junction block. Is the repair complete? | -- | System OK | -- |
14 |
Does the voltage measured equal the specified value? | B+ | Go to Step 15 | Go to Step 16 |
15 | Replace the underhood wiring harness junction block. Refer to Underhood Fuse Block Replacement in Engine Electrical. Is the repair complete? | -- | System OK | -- |
16 | Replace the heater A/C control assembly. Refer to Control Assembly Replacement . Is the repair complete? | -- | System OK | -- |
