Test "B" (Blower Motor Inoperative)

WARNING: This page is about a different car, the 1996 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

Check EATC System

Test EATC system operation. See EATC SYSTEM TEST under TESTING. Repair as necessary. If system tests okay, go to next step.

Check Blower Motor Operation

Start engine. Select MAX A/C. If blower motor does not run, go to next step. If blower motor runs, testing is complete. Blower motor is okay at this time.

Check Voltage At Orange/Black Wire Terminal Of Blower Speed Controller (BSC)

Turn ignition off. Disconnect BSC connector. Start engine. Select MAX A/C. Measure voltage between terminals No. 4 (Orange/Black wire) and No. 5 (Black wire) of BSC connector. If voltage is 10 volts or more, go to next step. If voltage is less than 10 volts, check fuse No. 6 in power distribution box, Black/Light Green wire, Black wire at BSC connector, Orange/Black wire and Pink/White wire.

Check Voltage At Blower Motor

Reconnect BSC connector. Disconnect blower motor connector. Measure voltage between Pink/White wire and Orange/Black wire terminals of blower motor connector. If voltage is 10 volts or less, go to next step. If voltage is more than 10 volts, replace blower motor.

Check EATC Module Voltage Input To BSC

Disconnect BSC connector. Set blower motor thumbwheel in highest speed setting. Measure voltage between terminals No. 3 (White/Pink wire) and No. 5 (Black wire) of BSC connector. If voltage is more than 10 volts, replace BSC. If voltage is 10 volts or less, go to next step.

Check Voltage Output At EATC Module

Turn ignition off. Reconnect BSC connector. Start engine. Select MAX A/C. Set blower motor thumbwheel in highest speed setting. Measure voltage between ground and terminal No. 9 (White/Pink wire) of EATC module connector (backprobe terminal). If voltage is 10 volts or less, replace EATC module (control panel). If voltage is more than 10 volts, repair White/Pink wire.