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. Place the ignition switch in the RUN position.
2. With a test light, backprobe the auxiliary heater-A/C control between connector C1 terminal 1 and ground.

Is the test light on?

--

Go to Step 3

Go to Step 4

3 | With a test light, backprobe the auxiliary heater-A/C control between connector C1 terminal 1 and connector C2 terminal C. Is the test light on? | -- | Go to Step 5 | Go to Step 6
4 | Repair the poor connection or open in CKT 641 between the auxiliary heater-A/C control connector C1 terminal 1 and S345. Is the repair complete? | -- | Go to Step 11 | --
5 |

1. Place the rear window wiper/washer and multi-function switch to the REAR position.
2. Connect a test light between the auxiliary heater-A/C control connector C1 terminal 3 and B+.

Is the test light on?

--

Go to Step 7

Go to Step 8

6 | Repair the poor connection or open in CKT 1750. Is the repair complete? | -- | Go to Step 11 | --
7 | Replace the auxiliary heater-A/C control. Refer to Control Assembly Replacement - Auxiliary in Side Trim Panel or Control Assembly Replacement - Auxiliary in Overhead Console . Is the repair complete? | -- | Go to Step 11 | --
8 | Connect the test light between the rear window wiper/washer and multi-function switch connector C2 terminal G and B+. Is test light on? | -- | Go to Step 9 | Go to Step 10
9 | Repair the poor connection or open in CKT 778. Is the repair complete? | -- | Go to Step 11 | --
10 | Replace the rear window wiper/washer and multi-function switch. Refer to Auxiliary Air Conditioning (A/C) Control Assembly Replacement - Front . Is the repair complete? | -- | Go to Step 11 | --
11 |

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

Have all the repairs been made?

--

Go to HVAC System Check

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