1992 Ford Ranger 6 cyl Two Wheel Drive Manual 366444 miles
my wipers were working fine and then they started to slow down and started to stutter and barely move at all, we changed the motor and the problem is the same, the speed control has no response the wipers move very slow
WIPERS INOPERATIVE OR ERRATIC IN INTERMITTENT OR LOW
Run wipers in HIGH position. If wipers do not hesitate, go to step 2). If wipers hesitate when they pass through park position, check interval governor ground under mounting screw. If ground is okay, interval governor is defective; service as required. If ground is not secure, tighten interval governor mounting screws.
Unplug wiper motor connector. Set wiper switch to LOW position. Check circuit No. 58 (White wire) for battery voltage. If battery voltage exists, check for malfunctioning wiper motor. Perform WIPER MOTOR CURRENT DRAW TEST and service as required.
If voltage is not present, check for the following conditions, and service or replace as necessary.
Malfunctioning wiper switch
Malfunctioning interval governor
Open in circuit No. 58 (White wire)
Removal & Installation
Interval governor is located under left center of instrument panel. Disconnect negative battery cable. Remove steering column shroud. Unplug interval governor connector from wiper control switch. Unplug interval governor connector from instrument panel wiring harness. Remove mounting screws and interval governor. See Fig. 7 . To install, reverse removal procedure.