For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the entire HVAC System Check performed? | -- | Go to Step 2 | Go to HVAC System Check
2 |

1. Disconnect the blower motor resistor connector.
2. Place the ignition switch in the RUN position.
3. Place the heater-A/C control in the inoperative position.
4. Connect a test light from the blower motor resistor connector inoperative terminal (1=B, 2=A, 3=D, 4=C) to ground on the harness connector.

Is the test light on?

--

Go to Step 3

Go to Step 4

3 | Replace the blower motor resistor. Go to Blower Motor Resistor Replacement . Is the repair complete? | -- | Go to Step 7 | --
4 | Backprobe with a test light between the heater-A/C control connector C1 of the inoperative terminal (1=H, 2=G, 3=F, 4=E) and ground. Is the test light on? | -- | Go to Step 5 | Go to Step 6
5 | Repair the open in the inoperative circuit (1=60, 2=63, 3=72, 4=73). Is the repair complete? | -- | Go to Step 7 | --
6 | Replace the heater-A/C control. Refer to Control Assembly Replacement . Is the repair complete? | -- | Go to Step 7 | --
7 |

1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components disconnected.

Have all repairs been made?

--

Go to HVAC System Check

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