For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the Heater Blower Controls System Check? | Go to Step 2 | Go to Heater Blower Controls System Check
2 | Test for an open in the BLK/WHT wire between the blower motor and the blower motor resistor. Is an open present? | Go to Step 6 | Go to Step 3
3 |

1. Turn the ignition switch to OFF.
2. Disconnect the blower speed selector switch.
3. Move the blower switch to the MEDIUM 1 position.
4. Test for an open between the blower speed selector switch terminals 3 and 4.
5. Move the blower switch to the MEDIUM 2 position.
6. Test for an open between the blower speed selector switch terminals 3 and 8.

Is an open present?

Go to Step 4

Go to Step 5

4 | Replace the blower speed selector switch. Refer to Blower Switch Replacement . Is the repair complete? | Go to Heater Blower Controls System Check | --
5 | Replace the blower motor resistor. Refer to Blower Motor Resistor Replacement . Is the repair complete? | Go to Heater Blower Controls System Check | --
6 | Repair the open in the BLK/WHT wire between the blower motor resistor and S200. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --