For 1990-2009 cars

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

1. Ignition switch ON.
2. Blower speed selector switch OFF.
3. Test for battery voltage at terminal 1 of the blower motor.

Is battery voltage present?

Go to Step 11

Go to Step 3

3 |

1. Ignition switch ON.
2. Blower speed selector switch OFF.
3. Test for battery voltage at terminal 5 of the blower motor relay.

Is battery voltage present?

Go to Step 4

Go to Step 5

4 | Repair the open in the BLU/WHT wire between the blower motor and the blower motor relay. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --
5 | Test for battery voltage at terminal 4 of the blower motor relay. Is battery voltage present? | Go to Step 7 | Go to Step 6
6 | Repair the open in the LT GRN wire between the blower motor relay and the blower fuse (in the junction block) OR in the RED wire between the blower fuse and the HTR fuse (in the fuse block). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --
7 |

1. Ignition switch ON.
2. Blower speed selector switch OFF.
3. Test for battery voltage at terminal 1 of the blower motor relay.

Is battery voltage present?

Go to Step 9

Go to Step 8

8 | Repair the open in the YEL/GRN wire between the blower motor relay and the DEF fuse (in the junction block). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --
9 | Test for an open in the BLK wire between the blower motor relay terminal 3 and G201. Was an open found? | Go to Step 18 | Go to Step 10
10 | Replace the blower motor relay. Refer to Blower Motor Relay Replacement . Is the repair complete? | Go to Heater Blower Controls System Check | --
11 |

1. Ignition switch OFF.
2. Blower speed selector switch to HIGH.
3. Test for continuity between terminal 2 of the blower motor and chassis ground.

Is continuity present?

Go to Step 12

Go to Step 13

12 | Replace the blower motor. Refer to Blower Motor and Fan Replacement . Is the repair complete? | Go to Heater Blower Controls System Check | --
13 | Test for continuity between terminal 2 of the blower motor and terminal 3 of the blower motor resistor. Is continuity present? | Go to Step 15 | Go to Step 14
14 | Repair the open in the PNK wire between the blower motor and S204 (in the harness about 15 centimeters (6 inches) from the blower motor resistor connector). Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --
15 |

1. Ignition switch OFF.
2. Blower speed selector switch to HIGH.
3. Disconnect the blower speed selector switch.
4. Test for continuity between terminals 1 and 2 of the blower speed selector switch.

Is continuity present?

Go to Step 16

Go to Step 17

16 | Repair the open or high resistance in the BLK wire between the blower speed selector switch terminal 1 and G200. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --
17 | Replace the blower speed selector switch. Refer to Blower Switch Replacement . Is the repair complete? | Go to Heater Blower Controls System Check | --
18 | Repair the open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | Go to Heater Blower Controls System Check | --