Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |
2 | Replace the blower motor relay with a known good relay. Does the blower motor operate properly? | -- | Go to Step 3 | Go to Step 4 |
3 | Replace the blower motor relay. Is the repair complete? | -- | System OK | -- |
4 | Turn the ignition to the OFF position. Unplug the blower motor relay. Check for power at female terminal 86 of blower motor relay receptical. Is power present? | 12V | Go to Step 5 | Go to Step 6 |
5 | Repair the short to B+ in the blower motor High circuit between the heater A/C control assembly and the blower motor relay. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | System OK | -- |
6 | Check for power at female terminal 87A of the blower motor relay receptical. Is power present? | -- | Go to Step 7 | Go to Step 9 |
7 | Disconnect the blower resistor assembly connector. Check for power at terminals A,B,C and D of blower resistor assembly connector. Is power present ? | 12V | Go to Step 8 | Go to Step 11 |
8 | Repair short to B+ on the circuit that was found to have power between the heater A/C control assembly and the blower resistor assembly. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | System OK | -- |
9 | Disconnect blower motor connector. Check terminal B of Blower Motor feed circuit for power. Is power present? | 12V | Go to Step 10 | System OK |
10 | Repair short to B+ in the blower motor power feed circuit between the blower relay and the blower motor. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | System OK | -- |
11 | Repair short to B+ in the blower resistor circuit between the blower resistor assembly and the blower relay. Refer to Wiring Repairs in wiring systems. Is the repair complete? | -- | System OK | -- |
