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 4 |
3 | Connect a test lamp between the blower motor relay terminal A1 and ground. Does the test lamp illuminate? | -- | Go to Step 6 | Go to Step 7 |
4 | 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 13 | Go to Step 5 |
5 | Replace the HVAC control blower switch. Refer to HVAC Control Blower Switch Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
6 | Connect the test lamp between the blower motor relay terminals A1 and C2. Does the test lamp illuminate? | -- | Go to Step 8 | Go to Step 9 |
7 | Repair a poor connection or an open in the control circuit of the high blower motor. Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 13 | -- |
8 | Connect a test lamp between the blower motor relay connector terminals A2 and C2. Does the test lamp illuminate? | -- | Go to Step 10 | Go to Step 12 |
9 | Repair a poor connection or an open in the ground circuit of the blower motor relay. Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 13 | -- |
10 | Test for a poor connection at the blower motor relay. 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 13 | Go to Step 11 |
11 | Replace the blower motor relay. Refer to Blower Motor Relay Replacement . Did you complete the replacement? | -- | Go to Step 13 | -- |
12 | Repair an open or a poor connection in the battery positive voltage circuit of the blower motor relay. Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 13 | -- |
13 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
