Pinpoint Test D - Wipers Inoperative At Interval Setting
WARNING: This page is about a different car, the 1997 Mercury Grand Marquis, 1997 Lincoln Town Car, and 1997 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
- Set wiper switch for low operation. If wipers operate at low speed, go to next step. If wipers do not operate at low speed, go to PINPOINT TEST C .
- Disconnect Wiper Control Module (WCM) connector. WCM is located behind instrument panel, to left of steering column. Set wiper switch for interval operation. Measure resistance between Brown/White wire and Orange wire at WCM wiring harness connector. If resistance is not 10,500-12,000 ohms, go to next step. If resistance is 10,500-12,000 ohms, go to step 4).
- Disconnect multifunction switch 7-pin connector. Measure resistance between Brown/White wire and Orange wire at multifunction switch. If resistance is 10,500-12,000 ohms, repair open in Brown/White wire or Orange wire between WCM and multifunction switch. If resistance is not 10,500-12,000 ohms, replace multifunction switch.
- Measure resistance between Brown/White wire and Dark Blue/White wire at multifunction switch while rotating interval control counter clockwise. If resistance does not change from 3300 ohms to 103,300 ohms, replace multifunction switch. If resistance changes from 3300 to 103,300 ohms, go to next step.
- Measure resistance of Dark Blue/White wire and Brown/White wire between ECM connector and multifunction switch connector. If resistance is 5 ohms or less, replace WCM. If resistance is greater than 5 ohms, repair open in Dark Blue/White wire or Brown/White wire.