Question about Lincoln Cars & Trucks
OWN a 2004 LINCOLN TOWNCAR. HERE IS THE PROBLEM. 1. WIPERS COME ON WHILE DRIVING BY THEMSELVES.WIPERS ARE STILL WORKING ON ALL SPEEDS; SO THOUGHT IT CAN'T BE THE WINDSHIELD WIPER MOTOR. COULD IT BE THE SWITCH? OR ELECTRICAL SHORT. IF SO HOW CAN I LOCATE WIRING? 2. HEADLIGHTS COME ON WITH THE WIPERS ON EVEN THOUGH HEADLIGHT KNOB IS IN THE OFF POSITION. 3. LIGHTS IN OFF POSITION COMES ON, AND THEN MY DASHBOARD LIGHTS TURN OFF. I PULLED PIPER 30AMP FUSE OUT, AND TURN WIPERS ON TO SEE WHAT WOULD HAPPEN, AND HEADLIGHTS STILL COME ON WHEN LIGHT SWITCH IN OFF POSITION.
Posted by Anonymous on
The thing too do would be look at wiring diagram's to see what ,if anything these two system's may have in common , power ,ground's ,wire's make contact some how in a same wiring harness or connector , Check the wiring harness for rubbed through areas ,wire's touching etc.... If no luck there , test each system's electrical circuit using voltage drop . Watch these video's ! Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
Electric Testing Techniques You Need to Know
Free wiring diagrams here http://www.bbbind.com/free_tsb.html
Enter the vehicle info. year , make , model an engine size . Under system click on body & accessories , then under subsystem click on wipers/washers ,then click the search button . Then click on the blue link. Looking at the wiper motor diagram you'll see the switch is a direct input to the motor ,the motor has a microprocessor an relay's built inside . The only way these type problems get found is by getting the DVOM - digital volt ohm meter out an testing the electrical circuit's .
Posted on Dec 11, 2017
Testimonial: "Will definitely follow your advice Jeff. Because the windshield wipers were working on low med. and high, I figured had to be in the electrical system; but was not sure. I was about to check the GEM to see if a wire had come loose or broke, causing a short in the wiper system, since it intermittently goes off and on. Right now 30 amp fuse is out, so will put back in and watch video. Thanks again buddy for your help."
Is this your first Lincoln? Our 1989 had "rain sensor" and the wipers would come on with the lights if it deemed the mist/rain was making the windshield damp. Almost all cars today have this build in the computer. Some work with a different circuit other than the wiper mode, to allow the lights to come on, the dimming of the dash lights means the lights are on, and then when they come back to a higher resolution they are off. I am not sure what you are saying about the light switch. So can't help you with that.
Posted on Dec 11, 2017
Testimonial: "Thanks for your input Jeanette; but comes on when weather is dry. Sounds very much like Jeff hit the nail on the head with my windshield wiper issue."
i have replaced my dimmer roller switch to solve my problem with the dash bord light flickering and dimming by them selfs .. that or just flip (smack) the roller switch for temp inprovement untill you decide to install a new dimming switch..?
Posted on Feb 09, 2009
Sounds like the PARK SWITCH within the WIPER MOTOR is at fault, Only way to beat it is relay the motor. Hope this helps
Posted on May 08, 2009
Fixed the wiper problem which was identical to Brad's by changing out the wiper module which is also called a pulse module or something of that nature. Pretty easy fix. You have to remove the grill that the wiper blades protrudes from in order to get to the motor (4 clips in front which can be removed by hand, remove radio antenna, a center push down retainer, two plastic end caps which pop off and then 1 star type screw on each end under the end caps). Getting the blades off seemed difficult. I used a small puller to pop them off after removing the nuts.
You can't buy this module at a regular parts store. I had to get it from the dealer so be prepared to spend $130 to $140 for the part or go to the salvage yard. Works great now.
Posted on May 20, 2009
2 ways of dealing with this. Install a new motor or put up with it until you install a new motor. I usually give it a very light tap with a hammer or a wrench & they start working fine at least for a while
Posted on Oct 15, 2009
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