Step | Action | Yes | No |
|---|---|---|---|
1 | Did you review the HVAC Blower Controls Circuit Description and perform the necessary inspections? | Go to Step 2 | |
2 | Operate the blower motor at each speed. Does the blower motor operate at low speed? | 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 4 | Go to Step 5 |
4 | Replace the blower speed switch. Refer to Blower Switch Replacement . Is the repair complete? | Go to Step 8 | -- |
5 | Backprobe the blower motor resistor connector with a test lamp from cavity 4 to chassis ground. Does the test lamp light? | Go to Step 6 | Go to Step 7 |
6 | Repair the open in the PNK/BLK wire between the blower speed switch and the blower motor resistor. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Step 8 | -- |
7 | Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement . Is the repair complete? | Go to Step 8 | -- |
8 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |
