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So that wipers park properly, the wipers have 2 power sources. One is from the dash switch to turn the wipers no and off, but the second is the parking power, which is always supposed to be on. The parking power is supposed to be shut off by a rotating cam inside of the wiper motor housing itself. If you don't want to take it out and fix it, you could always just pull the parking wire to the wipers, and then try to manually park them by shutting off the wipers at exactly the right time.
Hey Derek , here is how the wipers park position is suppose to work !
Windshield wiper motor park operation is controlled by the body control module (BCM) using an input from the park switch within the wiper motor assembly. The BCM monitors the windshield wiper motor park switch circuit to determine if the windshield wiper blades are at the bottom of the glass. The circuit will be pulled to ground by the wiper motor park switch while the windshield wiper motor is operating. When the wiper switch is turned to the OFF position while the wiper motor is somewhere in mid-cycle, the BCM will continue to operate the motor until the wipers reach the park position. If the ignition is turned OFF while the wipers are in mid-cycle, the wipers will stop immediately where they are. The BCM will park the wipers the next time the ignition is turned ON.
The wipers will not park when they are commanded ON and OFF with a scan tool. The BCM will park the wipers the next time the wiper switch is turned ON and OFF.
The BCM provides stall protection for the wiper motor by monitoring the park switch. If the park switch does not transition for 3 seconds while the wipers are operating, the BCM will assume that the wiper motor is stalled, and will de-energize the wiper relay until the wiper switch is cycled OFF and ON again.
Check for a voltage signal on the yellow wire at the wiper motor assembly , this is signal to the BCM ! If there is no signal you need to replace the windshield wiper motor assembly ? If there is a signal need to have Tech 2 scan tool hooked up to see if The BCM is the problem ! Relay #39 an #40 are the high an low wiper relays in the under hood fuse block ! Do you have a volt meter ,do you know how to do electrical testing ?
you must RUN the scanner/computer for easy diagnostic, and fix it. Remember the electronic vehicle is very complicated, You can have some faulty: PCM+ignition coil+BCM+sensor+etc. see the diagram attached. God bless you
I have a 95 explorer ... intermittent wiper and park not working. Hi and low works good. I replaced wiper run/park relay (R3146) Advance Auto Parts. Location underhood power distribution box left side outboard of brake fluid reservoir.
This sounds like the windshield wiper park switch has gone bad. This is a switch that allows the wipers to go in the "park" or stopped position. This unit is in the wiper motor so the only way to fix this problem is to remove and replace the entire motor assembly. The other thing that it could be would be a problem with the relay. The first thing that I would do is replace the relay. If this does not fix it then I would get the wiper motor replaced.
hi you have a short your favourite place to look is the wipers relay they are more likley to short than the switch and there cheaper if no joy remove your steering wheel cowls so you can get at the switch find out which wire feeds the relay to turn the wipers on see if its permenantly live when you turn the switch off if so replace switch if the switch works as it should and the relays ok then the motors faulty yates210456