Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
|
Important: A short to ground will cause an open fuse. Before performing this diagnostic procedure, inspect the fuses for an open. | ||||
1 | Did you perform the HVAC Blower Controls System Check? | -- | 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? | -- | -- | |
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? | -- | -- | |
8 | Replace the blower motor. Is the repair complete? | -- | -- | |
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? | -- | -- | |
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? | -- | -- | |
13 | Replace the right side IP wiring harness junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | -- | |
14 |
Does the voltage measured equal the specified value? | B+ | Go to Step 16 | Go to Step 15 |
15 | Replace the heater A/C control assembly. Is the repair complete? | -- | -- | |
16 |
Is the resistance within the specified range? | 0-2ohms | Go to Step 17 | Go to Step 19 |
17 | Backprobe the underhood wiring harness junction block connector C3 using a fused jumper between terminal C10 and B+. Does the blower motor operate? | -- | Go to Step 18 | Go to Step 20 |
18 | Replace the blower resistor assembly. Is the repair complete? | -- | -- | |
19 | Repair the open in CKT 101 between the blower resistor terminal E and the underhood wire harness junction block connector C3 terminal C10. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
20 | Replace the underhood wiring harness junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | -- | |
