## Heating

#### Blower Motor Circuit Troubleshooting (cont'd)

21-40

15. Ground each of the heater fan switch 7P connector terminals individually in the following order: No. 1, 5, 6 and 7.

HEATER FAN SWITCH 7P CONNECTOR

Wire side of female terminals

Does the blower motor run at progressively higher speeds?

YES - Replace the heater fan switch.

NO - Repair any open or cause of excessive resistance in the appropriate wire(s) between the blower resistor and the heater fan switch.

16. Turn the heater fan switch OFF and the ignition switch OFF.
17. Check the No. 12 (40A) fuse in the under-hood fuse/relay box and the No. 14 (10A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 18.

NO - Replace the fuse(s) and recheck.

18. Connect the No. 2 terminal of the blower motor 2P connector to body ground with a jumper wire.

BLOWER MOTOR 2P CONNECTOR

Wire side of female terminal

19. Turn the ignition switch ON (II).

Does the blower motor run?

YES - Go to step 20.

NO -Go to step 27.

20. Turn the ignition switch OFF.
21. Disconnect the jumper wire.
22. Disconnect the heater fan switch 7P connector.
23. Turn the ignition switch ON (II).
24. Measure the voltage between the No. 7 terminal of the heater fan switch 7P connector and body ground.

HEATER FAN SWITCH 7P CONNECTOR

Wire side of female terminals

Is there battery voltage?

YES - Go to step 25.

NO - Repair open in the wire between the blower motor and the heater fan switch.

25. Turn the ignition switch OFF.