Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: The blower motor operates in at least one, but not all, speed positions. | |||
1 | Did you review the HVAC operation and perform the necessary inspections? | Go to Step 2 | |
2 |
Does the blower motor operate properly in each speed position? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 |
Does the test lamp illuminate in each speed position? | Go to Step 7 | Go to Step 4 |
4 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 10 |
5 |
Important: The blower motor switch must be in the correct speed position for the blower motor control circuit being tested.
Does the test lamp illuminate in each speed position? | Go to Step 8 | Go to Step 6 |
6 | Test the suspect blower motor control circuit for an open. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 14 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the blower motor assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 14 | Go to Step 11 |
8 | Inspect for poor connections at the harness connectors of the blower motor resistor assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
9 | Inspect for poor connections at the harness connector of the HVAC control assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 14 | Go to Step 13 |
10 | Repair the battery positive voltage circuit of the blower motor resistor assembly. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 14 | -- |
11 | Replace the blower motor. Refer to Blower Motor Replacement . Did you complete the replacement? | Go to Step 14 | -- |
12 | Replace the blower motor resistor assembly. Refer to Blower Motor Resistor Assembly Replacement . Did you complete the replacement? | Go to Step 14 | -- |
13 | Replace the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement . Did you complete the replacement? | Go to Step 14 | -- |
14 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |