Mechanics

HEATER DONT WORK

2000 Ford Focus

Heater problem
2000 Ford Focus Automatic

THE FAN WILL NOT WORK. NOTHING COMES ON
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EVILEE
December 13, 2008.



SYSTEM TESTS
BLOWER MOTOR DOES NOT OPERATE
Check fuse No. 64 (30-amp) in Battery Junction Box (BJB), located in left rear corner of engine compartment. If fuse is blown, replace fuse. If fuse blows again, repair short to ground in Green/Orange wire between fuse No. 64 (30-amp) in BJB and terminal No. 1 of heater blower motor. If fuse is okay, go to next step.
Turn ignition off. Disconnect blower motor harness connector. Turn ignition on. Measure voltage between ground and terminal No. 1 (Green/Orange wire) of blower motor harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair short to ground in Green/Orange wire between fuse No. 64 (30-amp) in BJB and heater blower motor.
Turn ignition off. Measure resistance between ground and terminal No. 2 (Black/Red wire) of blower motor. If resistance is 5 ohms or less, replace heater blower motor. See BLOWER MOTOR under REMOVAL & INSTALLATION. If resistance is more than 5 ohms, go to next step.
Disconnect blower switch. Measure resistance between terminal No. 2 (Black/Red wire) of heater blower motor harness connector and terminal No. 4 (Black/Orange wire) of heater blower switch harness connector. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in wire between blower motor and blower motor switch.
Measure resistance between ground and terminal No. 6 (Black wire) of blower switch. If resistance is 5 ohms or less, replace blower motor switch. If resistance is more than 5 ohms, repair open between blower motor switch and ground (located at left " A" pillar).

Dave H
Dec 13, 2008.