Pinpoint Test D: The Wipers Stay On Continuously - Rear Window

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK THE MULTI-FUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multi-function Switch C202
- Carry out the multi-function switch component test.
- Did the multi-function switch pass the component test?
1. YES : Go to D2.
2. NO : INSTALL a new multi-function switch. REFER to STEERING COLUMN SWITCHES .
D2 CHECK CIRCUITS CRW20 (GY/YE) AND CRW21 (YE/VT) FOR A SHORT TO GROUND
- Disconnect: Rear Window Wiper Motor C4218
- Measure the resistance between rear window wiper motor C4218-4, circuit CRW20 (GY/YE), harness side and ground; and between rear window wiper motor C4218-3, circuit CRW21 (YE/VT), harness side and ground.
- Are the resistances greater than 10,000 ohms?
1. YES : Go to D3.
2. NO : REPAIR the circuit(s) in question. TEST the system for normal operation.
D3 CHECK FOR CORRECT WIPER MOTOR OPERATION
- Disconnect all wiper motor connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect all wiper motor connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : Go to D4.
2. NO : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
D4 CHECK THE REAR WINDOW WIPER MOTOR
- Carry out the rear window wiper motor component test as outlined.
- Did the rear window wiper motor pass the component test?
1. YES : The system is operating correctly at this time. Concern may have been caused by binding or incorrect pivot arm adjustment. TEST the system for normal operation.
2. NO : INSTALL a new rear window wiper motor. REFER to Wiper Motor - Rear Window .