For 1990-2009 cars

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

1. Turn the ignition switch to the ON position.
2. Backprobe the blower speed selector switch connector with a test lamp from terminal 1 to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 3

3 | Test for an open in the LT GRN or the BLK wire between the junction block and the blower speed selector switch. Did you find an open? | -- | Go to Step 11 | Go to Step 4
4 | Replace the junction block. Is the repair complete? | -- | Go to Heater Blower Controls System Check | --
5 |

1. Turn the blower speed selector switch to the HIGH position.
2. Backprobe the blower motor connector with a test lamp from terminal 2 to ground.

Does the test lamp light?

--

Go to Step 8

Go to Step 6

6 | Test for an open in the PNK wire between S232 and the blower motor. Did you find an open? | -- | Go to Step 11 | Go to Step 7
7 | Replace the blower speed selector switch. Refer to Blower Switch Replacement . Is the repair complete? | -- | Go to Heater Blower Controls System Check | --
8 | Backprobe the blower motor connector with a test lamp from terminal 1 to B+. Does the test lamp light? | -- | Go to Step 10 | Go to Step 9
9 | Repair the open in the BLK wire between the blower motor and G202. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Heater Blower Controls System Check | --
10 | Replace the blower motor. Refer to Blower Motor and Fan Replacement . Is the repair complete? | -- | Go to Heater Blower Controls System Check | --
11 | Repair the open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Heater Blower Controls System Check | --