Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you review the HVAC system operation and perform the necessary inspections? | -- | Go to Step 2 | Go to Symptoms |
2 | Verify that the blower motor Med-2 speed is inoperative. Does the blower motor operate normally? | -- | 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 motor resistor. Refer to Blower Motor Resistor Replacement in Heating, Ventilation and Air Conditioning. Is the replacement complete? | -- | Go to Step 8 | -- |
5 | Connect a test lamp between CKT 72 (LT BLU) wire cavity B at the heater and the air conditioning (A/C) controller connector C3 and ground. Does the test lamp light? | -- | Go to Step 6 | Go to Step 7 |
6 | Repair the open in CKT 72 (LT BLU) wire. Is the repair complete? | -- | Go to Step 8 | -- |
7 | Replace the heater and the A/C controller. Refer to Control Assembly Replacement . Is the replacement 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 |
