Test E: Driver's Power Window Inoperative (2 & 4-Door)

1. Turn ignition switch to RUN position. Operate driver's power window control switch to first detent. If one-touch down relay clicks, go to next step. If one-touch down relay does not click, go to step  5 .
2. Turn ignition switch to LOCK position. Disconnect driver's power window motor harness connector C782. Turn ignition switch to RUN position. Measure voltage between ground and driver's power window motor harness connector C782 terminal No. 2 (White wire). If battery voltage exists, go to next step. If battery voltage does not exist, go to step  7 .
3. Measure voltage between ground and driver's power window motor harness connector C782 terminal No. 1 (Yellow wire). If battery voltage exists, go to next step. If battery voltage does not exist, go to step  8 .
4. Turn ignition switch to LOCK position. Measure resistance across driver's power window motor connector. If resistance is less than 5 ohms, verify customer concern. If resistance is more than 5 ohms, replace driver's power window motor. Retest system operation.
NOTE: On early production vehicles one-touch down relay is located behind driver's door trim panel. On late production vehicles relay is integral to driver's power window control switch.
5. Turn ignition switch to LOCK position. Disconnect one-touch down relay. Turn ignition switch to RUN position. Measure voltage between ground and one-touch down relay harness connector C738 terminal No. 3 (Green/Black wire). See Fig 1 . If battery voltage exists, go to next step. If battery voltage does not exist, go to step  9 .
6. Measure voltage between ground and one-touch down relay harness connector C738 terminal No. 2 (Green/Black wire). If battery voltage exists, replace one-touch down relay, and retest system operation. If battery voltage does not exist, repair open or short to ground in Green/Black wire between Central Junction Box (CJB) and one-touch down relay.
7. Turn ignition switch to LOCK position. Measure resistance in White wire between driver's power window motor harness connector C782 and one-touch down relay harness connector C738 terminal No. 5. See Fig 1 . If resistance is more than 5 ohms, repair open in White wire between one-touch down relay and CJB. If resistance is less than 5 ohms, replace one-touch down relay. Retest system operation.
8. Turn ignition switch to LOCK position. Disconnect driver's power window control switch harness connector C488. Measure resistance in Yellow wire between driver's power window control switch harness connector C488 terminal No. 9 and driver's power window motor harness connector C782 terminal No. 1. See Figure . If resistance is more than 5 ohms, repair open in Yellow wire between driver's power window control switch and driver's power window motor. If resistance is less than 5 ohms, replace driver's power window motor. Retest system operation.
9. Turn ignition switch to LOCK position. Disconnect driver's power window control switch harness connector C488. Measure resistance in Green/Black wire between driver's power window control switch harness connector C488 terminal No. 11 and one-touch down relay harness connector C738 terminal No. 3. See Figure and Fig 1 . If resistance is more than 5 ohms, repair open in Green/Black wire and between driver's power window control switch and one-touch down relay. If resistance is less than 5 ohms, replace driver's power window control switch. Retest system operation.

Fig 1: Identifying One-Touch Down Relay Harness Connector C738 Terminals (Early Production)

Courtesy of FORD MOTOR CO.