Wiper/Washer Pulse Control Resistance Test
- Disconnect wiper motor module connector C1. Disconnect negative battery cable. Turn ignition switch to OFF position and wiper/washer switch to LO position. Use an ohmmeter to measure resistance between C1 terminal "B" (Gray wire) and C1 terminal "F" (Pink wire). If resistance is approximately 24 k/ohms and washer does not operate, proceed to WASHER MOTOR VOLTAGE TEST . If resistance is approximately 24 k/ohms and washer operates, check for binding linkage. If linkage is okay, repair wiper motor.
- If reading is not approximately 24 k/ohms, check for open or poor connection in circuits No. 94 (Pink wire) and 91 (Gray wire). If wires and connection are okay, replace wiper/washer switch. Move wiper delay switch through range to maximum delay position. Check resistance between C1 terminal "B" (Gray wire) and C1 terminal "F" (Pink wire).
- If resistance is approximately 1.2 megohms and washer does not operate, proceed to WASHER MOTOR VOLTAGE TEST . If resistance is approximately 1.2 megohms and washer operates, check for binding linkage. If linkage is okay, repair wiper motor. If reading is not approximately 1.2 megohms, check for open or poor connection in circuits No. 94 (Pink wire) and 91 (Gray wire). If wires and connection are okay, replace wiper/washer switch.
- Place wiper delay switch in MAX position. Press and hold washer switch. Use an ohmmeter to measure resistance between C1 terminal "B" (Gray wire) and C1 terminal "F" (Pink wire). If resistance is less than .5 ohm and washer does not operate, proceed to WASHER MOTOR VOLTAGE TEST . If resistance is less than .5 ohm and washer operates, check for binding linkage. If linkage is okay, repair wiper motor. If resistance is greater than .5 ohm, check circuits No. 91 (Gray wire) and 94 (Pink wire) for open, short to ground or poor connection. If wires and connection are okay, replace wiper/washer switch.