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89 FORD TRUCK WIPERS ?
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Posted: 03/14/09
10:24 AM
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HI I have replaced the wiper motor and switch in my truck but the wipers still hesitate. when they hesitate the volt meter drops 3 volts until they start moving again. its like they work fine for 3 minites then they start screwing up. it will get worse until they stop. do they have a resister or something. i dont know what else to do. please help... r
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Posted: 03/17/09
05:37 AM
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I'm assuming this truck has intermittent wipers? If so it is usually a separate module (under the dash, oftern with a sticker that says fragile/do not drop). It's possible the voltage, even on low or high speeds, still passes through the intermittent wiper module and the issue is in the module? I'd also check for good solid grounds. Often the wiper motor is case grounded and there could be an issue with not enough grounding going on. Try running a decent ground wire from one of the motor's mounting bolts to a fender bolt, engine block bolt, or even right to the battery negative terminal and see if it helps...
HTH...
Mark
Mark Houlahan
Editor
Modified Mustangs & Fords Magazine
1965 FFR Roadster 427W/TKO-600
1966 Mustang 289-4V/C4
1968 Mustang 4.6L Three-Valve/5R55S auto
1990 Mustang 347/AOD
1998 Escort 2.0L SOHC/F4E-111 Auto
2002 Explorer Sport Trac 4.0L V-6/5R55 Auto
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