Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: The auxiliary blower motor is inoperative in all speed positions. | |||
1 | Did you review the HVAC operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Is the auxiliary blower motor inoperative in all speed positions? | Go to Step 4 | Go to Step 3 |
3 |
Is the auxiliary blower motor inoperative in all speed positions? | Go to Step 9 | |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 6 |
5 |
Does the test lamp illuminate? | Go to Step 11 | Go to Step 13 |
6 | Test the auxiliary blower motor supply voltage circuit for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 7 |
7 | Test the ignition 3 voltage circuit for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 8 |
8 | Test the battery positive voltage circuit to the auxiliary blower motor relays for an open, high resistance or short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 9 |
9 | Test the applicable blower motor speed control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 10 |
10 | Test the ground circuit of the auxiliary blower motor switch, auxiliary heat only, or front auxiliary HVAC control assembly, auxiliary heat and A/C, for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 12 |
11 | Inspect for poor connections at the harness connector of the auxiliary blower motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 14 |
12 | Inspect for poor connections at the harness connector of the auxiliary blower motor switch, auxiliary heat only, or front auxiliary HVAC control assembly, auxiliary heat and A/C. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 15 |
13 | Repair the ground circuit of auxiliary blower motor for an open. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- |
14 | Replace the auxiliary blower motor. Refer to Auxiliary Blower Motor Replacement . Did you complete the replacement? | Go to Step 16 | -- |
15 | Replace the auxiliary blower motor switch, auxiliary heat only, or the front auxiliary HVAC control assembly, auxiliary heat and A/C. Refer to Auxiliary Blower Motor Switch Replacement or Auxiliary Heater and Air Conditioning Control Replacement - Front . Did you complete the replacement? | 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 |