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 15 |
3 |
Does the test lamp illuminate? | -- | Go to Step 4 | Go to Step 5 |
4 |
Does the blower motor run? | -- | Go to Step 8 | Go to Step 7 |
5 | 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 20 | Go to Step 6 |
6 | Replace the HVAC control blower switch. Refer to HVAC Control Blower Switch Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
7 |
Does the test lamp illuminate? | -- | Go to Step 11 | Go to Step 10 |
8 | Test for and repair 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 20 | Go to Step 9 |
9 | Replace the blower motor relay. Refer to Blower Motor Relay Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
10 |
Does the test lamp illuminate? | -- | Go to Step 14 | Go to Step 13 |
11 | Test for and repair a poor connection at the blower motor. 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 20 | Go to Step 12 |
12 | Replace the blower motor. Refer to Blower Motor and Fan Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
13 | Repair a poor connection or an open in the supply voltage circuit of the blower motor. Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 20 | -- |
14 | Repair a poor connection or an open in the ground circuit of the blower motor. Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 20 | -- |
15 | Probe the HVAC control (selector switch) between connector C2 terminal C and ground. Does the test lamp illuminate? | -- | Go to Step 16 | Go to Step 19 |
16 | Test for and repair an open or a poor connection in the A/C request signal circuit at the HVAC control (selector switch) connector C2 terminals B and C. Refer to Circuit Testing or Testing for Intermittent Conditions and Poor Connections and Wiring Repairs or Connector Repairs in Wiring Systems. Did you find and repair an open or a poor connection? | -- | Go to Step 20 | Go to Step 17 |
17 | Test for and repair a poor connection at the HVAC control (selector switch). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 20 | Go to Step 18 |
18 | Replace the HVAC control (selector switch). Refer to Control Assembly Replacement . Did you complete the replacement? | -- | Go to Step 20 | -- |
19 | Repair a poor connection or an open in the ignition 3 voltage circuit between the HVAC control (selector switch) connector C2 terminal C and S248. Refer to Connector Repairs or Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
