Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: HVAC Schematics DEFINITION: The blower motor is ON while the blower motor switch is in the OFF position. | ||||
1 | Did you perform the HVAC Diagnostic System Check? | -- | Go to Step 2 | |
2 |
Does the blower motor operate? | -- | Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
3 |
Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 4 |
4 | Measure the voltage on terminal 11 of the heater and A/C control. Does the voltage measure near the specified value? | 0 V | Go to Step 5 | Go to Step 8 |
5 |
Did the blower motor stop operating? | -- | Go to Step 7 | Go to Step 6 |
6 | Inspect the blower motor housing for a short to ground. Refer to Testing for Short to Ground in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 9 |
7 | Inspect for poor connections at the harness connector of the blower control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 |
8 | Inspect for poor connections at the harness connector of the heater and A/C control. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 |
9 | Inspect for poor connections at the harness connector of the blower motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you correct the condition? | -- | Go to Step 12 | -- |
10 | Replace the blower control module. Refer to Blower Motor Control Module Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- |
11 |
Important: Perform the set up procedure for the heater and A/C control. Replace the heater and A/C control. Refer to HVAC Control Module Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- |
12 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 2 |
