Blower Motor Does Not Operate

Step 1: Check fuse/Relay




1. Check "BLOWER" fuse.
2. If a fuse is Open, check for a short-circuit in wiring harness before replacing "BLOWER" fuse.




3. If fuse is OK proceed to inspection.

Inspection

Blower relay
1. Disconnect blower relay.




2. Check continuity between terminals of relay.
3. It not as specified, replace relay.
4. If correct, go to next step.
5. Apply 12 V to terminal 2 and ground terminal 4.




6. Check for continuity between terminals 1 and 3.
7. If not as specified, replace relay.
8. If correct, go to Step 2.

Step 2: Check voltage at blower motor

1. Turn ignition switch ON.
2. Turn blower switch to OFF.




3. Measure voltage at following pin of blower motor connector G-07.

Step 3: Check voltage at blower motor resistor assembly

1. Turn ignition switch ON.
2. Turn blower switch OFF and verify that A/C switch is OFF.







3. Measure voltage at following pins of resistor assembly connector G-06.

Step 4: Check voltage at blower switch

1. Turn ignition switch ON.
2. Turn blower switch to OFF.




3. Measure voltage at following pins of blower switch connector G-03.

Step 5: Check ground at blower switch

1. Turn the ignition switch to OFF position.
2. Verify that the blower and A/C switches are in OFF position.




3. Use ohmmeter to check continuity from ground to following terminal of blower switch connector G-03.
4. Turn the blower switch to ON position.




5. Use ohmmeter to check continuity from ground to following terminal of blower switch connector G-03.

Inspection

Blower switch




1. Check continuity between terminals of blower switch.




2. If not as specified replace blower switch.