Test A: All Power Windows Inoperative
- Remove 20-amp power window circuit breaker from fuse block located below left side of dashboard. See Figure
. Check circuit breaker. If circuit breaker is okay, go to 5
. If circuit breaker is not okay, go to next step.
- Reinstall circuit breaker. Turn ignition switch to RUN position. Operate power window system. Reinspect circuit breaker. If circuit breaker failed, go to next step. If circuit breaker did not fail, go to step 5
.
- Turn ignition off. Disconnect harness connector at left and right door window switches. See WINDOW SWITCH
under REMOVAL & INSTALLATION. Using ohmmeter, check resistance between ground and fuse block Light Blue/Black wire (power window feed circuit). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, repair short to ground in Light Blue/Black wire between fuse block and window switches. See WIRING DIAGRAMS
.
- With ignition switch OFF, disconnect master power window regulator control switch connector. Measure resistance between the following wire terminals (connector harness) and ground. See WIRING DIAGRAMS
.
- White/Yellow, Tan/Light Blue, Yellow and White/Black. (Front window motors.)
- On crew cab only, also check Gray/Orange, Yellow/Light Blue, Red/Black and Yellow/Black wires. (Rear window motors.)
If any resistance less than 5 ohms? If yes, service circuit in question for a short to ground. Replace circuit breaker. If no, go to next step.
- Ensure ignition is off. Disconnect master window switch. Using ohmmeter, measure resistance between ground and master window switch harness connector Black wire. If resistance is less than 5 ohms, go to next step. If resistance more than 5 ohms, repair open in Black wire between master window switch harness connector and ground. See WIRING DIAGRAMS
.
- Ensure ignition is off. Remove master window switch from trim panel. Leave switch connected to harness connector. Turn ignition switch to RUN position. Using voltmeter, measure voltage between ground and each wire color and switch position indicated in Fig 1
. If all voltages are within specification, go to next step. If all voltages are not within specification, replace master window switch.
Courtesy of FORD MOTOR CO.
- With ignition switch OFF, disconnect passenger power window regulator control switch connector. Turn ignition switch to RUN/ACC. Measure voltage on Light Blue/Black) wire at passenger power window regulator control switch connector. Is voltage greater than 10 volts? If yes, go to next step. If no, service Light Blue/Black) wire between passenger window regulator control switch and interior fuse panel.
- On all models, turn ignition off. Reconnect master window switch. Remove right door window switch. Leave switch connected to harness connector. Turn ignition switch to RUN position. Using voltmeter, check voltage between ground and each wire color and switch position indicated in Fig 2
. If all voltages are within specification, go to next step. If all voltages are not within specification, replace right door window switch.
Courtesy of FORD MOTOR CO.
- Turn ignition off. Disconnect right door switch from harness connector. Disconnect right door window motor. Using ohmmeter, check resistance between right door switch connector White/Yellow wire and window motor harness connector White/Yellow wire. Check resistance between right door switch connector Tan/Light Blue wire and window motor harness connector Tan/Light Blue wire. If resistance is less than 5 ohms, replace right door window motor. If resistance is more than 5 ohms, repair wire in question.