Blower Motor Inoperative in One Speed Only High Speed Operates Normally
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you complete the Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check |
2 |
Does the test lamp illuminate? | -- | Go to Step 3 | Go to Step 5 |
3 | Test for and repair a poor connection at the blower resistor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and repair a poor connection? | -- | Go to Step 9 | Go to Step 4 |
4 | Replace the blower resistor. Refer to Blower Motor Resistor Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
5 | Probe with a test lamp between the HVAC control (blower switch) connector C1 of the inoperative terminal (position 1 (low) =A, 2 (M1) =C, 3 (M2) =D) and ground. Does the test lamp illuminate? | -- | Go to Step 6 | Go to Step 7 |
6 | Repair a poor connection or an open in the inoperative circuit (position 1 (low) =60, 2 (M1) =63, 3 (M2) =72). Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 9 | -- |
7 | Test for and repair a poor connection at the HVAC control (blower switch). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and repair a poor connection? | -- | Go to Step 9 | Go to Step 8 |
8 | Replace the HVAC control blower switch. Refer to HVAC Control Blower Switch Replacement . Did you complete the replacement? | -- | Go to Step 9 | -- |
9 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
