Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Exchange the blower motor relay with a known good relay from the underhood junction block. Does the blower motor operate? | -- | Go to Step 2 | Go to Step 3 |
2 | Replace the faulty relay. Is the repair complete? | -- | -- | |
3 | Backprobe the underhood junction block connector C3 using a fused jumper between terminal B9 and B+. Does the blower motor operate? | -- | Go to Step 9 | Go to Step 4 |
4 |
Does the test lamp light? | -- | Go to Step 5 | Go to Step 6 |
5 | Connect a test lamp between terminal A and terminal B of the blower motor connector. Does the test lamp light? | -- | Go to Step 7 | Go to Step 8 |
6 | Repair the open in CKT 65 between the underhood junction block and the blower motor. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
7 | Replace the blower motor. Refer to Blower Motor and Fan Replacement . Is the repair complete? | -- | -- | |
8 | 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? | -- | -- | |
9 |
Does the voltage measured equal the specified value? | B+ | Go to Step 13 | Go to Step 10 |
10 |
Does the voltage measured equal the specified value? | B+ | Go to Step 11 | Go to Step 12 |
11 | Repair the open in CKT 641 between the right IP junction block and the heater A/C control assembly. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | -- | |
12 | Replace the right IP junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | -- | |
13 |
Does the voltage measured equal the specified value? | B+ | Go to Step 15 | Go to Step 14 |
14 | Replace the heater A/C control assembly. Refer to Control Assembly Replacement . Is the repair complete? | -- | -- | |
15 |
Is the resistance within the specified range? | 0-2ohms | Go to Step 16 | Go to Step 18 |
16 | Backprobe the underhood junction block connector C3 using a fused jumper between terminal C10 and B+. Does the blower motor operate? | -- | Go to Step 17 | Go to Step 19 |
17 | Replace the blower resistor assembly. Refer to Blower Motor Resistor Replacement Is the repair complete? | -- | -- | |
18 | 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? | -- | -- | |
19 | Replace the underhood junction block. Refer to Relay/Fuse Center Replacement in Wiring Systems. Is the repair complete? | -- | -- |
