For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the HVAC System Check? | Go to Step 2 | Go to HVAC System Check
2 | Remove the HTR relay from fuse and relay block 3. Does the blower motor run? | Go to Step 3 | Go to Step 4
3 | Repair the short to voltage in the BLK wire between fuse and relay block 3 and the blower motor. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to HVAC System Check | --
4 | Test that the HTR relay is open between terminals 4 and 5 and that there is continuity between terminals 4 and 2. Refer to Fuse and Relay Block 3 . Did the relay test OK? | Go to Step 5 | Go to Step 6
5 |

1. Turn the blower speed selector switch to OFF.
2. Test for a short to ground in the BLU/ORN wire between fuse and relay 3 and the blower speed selector switch.

Is a short present?

Go to Step 7

Go to Step 8

6 | Replace the HTR relay. Refer to Blower Motor Relay Replacement . Is the repair complete? | Go to HVAC System Check | --
7 | Repair the short. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to HVAC System Check | --
8 | Replace the blower speed selector switch. Refer to Blower Switch Replacement . Is the repair complete? | Go to HVAC System Check | --