Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 |
Does the blower motor operate in the LO position? | -- | Go to Step 3 | Go to Step 4 |
3 | Turn the fan switch slowly from the LO position to the M1 position. Does the blower motor operate in the M1 position? | -- | Go to Step 5 | Go to Step 6 |
4 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 7 |
5 | Turn the fan switch slowly from the M1 position to the M2 position. Does the blower motor operate in the M2 position? | -- | Go to Step 16 | Go to Step 9 |
6 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 10 |
7 | Using a test lamp backprobe from the heater and A/C control module connector C2 CKT 60 (YEL) cavity A to ground. Does the test lamp illuminate? | -- | Go to Step 12 | Go to Step 11 |
8 | Replace the blower motor resistor and relay pack. Refer to Control Assembly Replacement in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 16 | -- |
9 |
Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 14 |
10 | Using a test lamp backprobe from the heater and A/C control module connector C2 CKT 63 (TAN) cavity B to ground. Does the test lamp illuminate? | -- | Go to Step 13 | Go to Step 11 |
11 | Replace the heater and A/C control module. Refer to Control Assembly Replacement in Heating, Ventilation, and Air Conditioning. Did you complete the replacement? | -- | Go to Step 16 | -- |
12 | Repair the open in CKT 60 (YEL). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- |
13 | Repair the open in CKT 63 (TAN). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- |
14 | Using a test lamp backprobe from the heater and A/C control module connector C2 CKT 72 (LT BLU) cavity C to ground. Does the test lamp illuminate? | -- | Go to Step 15 | Go to Step 11 |
15 | Repair the open in CKT 72 (LT BLU). Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | -- |
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
