Motor Park Test
- Turn ignition switch on. With system operating in low, turn switch off with wiper blades in straight-up position. Blades should complete cycle and return to position below windshield. If motor does not park correctly, proceed to step 2).
- Remove connector and check for battery voltage at circuit 65. See Fig 1
. If voltage is not present, service circuit as required. If voltage is present, check ground. If ground is poor, check switch cover screw and motor ground strap for tightness.
- If ground is good, remove motor connections and check for continuity between circuits 28 and 56 in wiring harness. If there is no continuity, service circuit. If continuity exists, check for ground at circuit pin 28 on motor. If open, service park switch.
- If ground exists, check for continuity between circuits 61 and 63 in wiring harness. If continuity exists, check for continuity between circuit pins 63 and 65 on motor. If open, replace wiper switch.
- If no continuity exists between circuits 61 and 63 in wiring harness, check for continuity between terminals "P" and "G" on wiper switch. If no continuity, replace switch. If continuity exists, replace governor.
- If wiper blades return to depressed park position (below windshield), but wiper motor keeps running, repair or replace wiper motor park switch.
- If wiper blades stall or jam (motor starts running in reverse direction) while going from park to depressed park position (below windshield), check linkage and repair as required. If okay, repair wiper motor arm and windlatch assembly.
- If wiper blades complete cycle, but continue to wipe for part of another cycle and park on windshield. See WIPER SWITCH CONTINUITY TEST. If wiper blades run continuously in "OFF" or "INT position, or wiper blades run to bottom of windshield and stop, but will not depress park below windshield. See WIPER SWITCH CONTINUITY TEST.
Courtesy of FORD MOTOR CO.