I have a 1986 F250. There is a reoccurring problem with leaves getting into the resistor for the heating and air conditioning fan control, smoldering and sending a smoky smell and once full on smoke into the cab. I take the hatch/resistor off clean it out the best I can with compressed air and the shop vac, put it back together and it's fine for a week to a month, then the whole ordeal starts all over. So I figure I'm gonna solve the problem by taking the grill between the hood and windshield off and cleaning the leaves out. I've taken all the obvious screws out but it seems to be attached under the windshield trim and I can't get the wiper arms off. My questions are how do you remove the windshield trim? (do you need a special tool?) and how do you remove the wiper arms?
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Re: '86 F250 wiper arm windshield trim removal
Lift arms off windshield there should be a little *** on side that pulls out. / if not there should be small holes near base. slide a pick or small allen through holes when arm is lifted off windshield. with ***/pick in place( wipers shouldn't be touching windshield) arms will wiggle right off
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First are you sure that the motor is bad? Did you check the fuse, 4.8 amp circuit breaker(this goes out alot causing the wipers not to work.It is in position 15 on you fuse box), switch. If all of those are good then it is time to change the wiper motor. You will need a Phillips head screwdriver, a flat head screwdriver, a rachet and I believe a 7/16 socket. First thing you need to do is remove the wiper arms, to do this simply lift the blade away from the window. On the bottom of the wiper arm where it connects you should see a little slide with the arm pulled back use the flat head screwdriver and slide the slide over to hold up the arm. now go ahead and remove the wiper arm. Once you have removed the wiper arms not it is time to remove the trim (the trim is the vent looking piece under the wiper arms)over the wiper motor. To do this you will need you Phillips head and remove I believe 6 or head screws that are in the trim, be careful when you remove the trim as you washer hoses are attached to this. Now take you rachet and remove the 2 or 3 bolts holding the motor in, unplug the wires and remove it from the wiper track. To install just do everything in reverse It also possible for your wiper switch or the wiper governor (module) to go bad. I would suggest you test the new motor by removing the plug and pluggin it into the new motor before taking anything apart. It might not be a bad motor.
look for signs of a windshield leaking water into fuse/relay box- located near pedals under dash. Also remove small plastic trim below steering wheel ( 2 screws) and unplug black connector with 6 or 8 wires directly under steering column. Turn key on if wipers are stopped then your switch is bad- steering wheel must be removed to change switch.
I have seen some problems with water coming in through the cabin air filter. (Also known as passenger compartment air filter - see picture) Sometimes this is caused by a buildup of leaves and debris in the cowl area that causes water to overflow into the filter area. Sometimes this is caused by the filter not being installed correctly. I have even seen the water diverter that goes over the top of the filter get discarded by quick-lube "specialists". Anyway, these conditions will allow water to enter into the vehicle through the heater system. Many times I have seen the filter so badly damaged by water and debris that it ends up in the blower motor and stops it from running. This is where I would look for the problem first.
The wiper linkage s almost always held on to the motor with a nut on the windshield side. If you can't move the motor around enough to get at it then you will have to take off the grill or cowl on top of it. There should be screws in the end facing the hood. Undo them and it should come off. Then you can undo the nut. Hope this helps.
The windshield wiper linkage comes as an assembly. The assembly comes with the two rotating splines that the wiper arms attach to. you must remove wiper arms. Remove cowl trim and remove bolts that hold the pivot points to the body. The new linkage that snaps to the wiper motor should come with a new retaining clip. You have to fish the linkage assembly through the access holes in the body by un bolting the wiper motor.
Remove the rear pivot arm; refer to Pivot Arm—Rear .
Remove rear pivot arm.
Lift the pivot arm nut cover.
Remove the nut.
Remove the pivot arm.
Remove the liftgate door trim panel; refer to Section 501-05 . Remove the (A) liftgate handle to liftgate screws and the (B) liftgate handle. Remove the liftgate trim panel screw access plug. Remove the screw.
Remove the liftgate door trim panel.
Use Windshield and Molding/Trim Removal Kit to remove the liftgate door trim panel from the liftgate window opening.
Push the liftgate door trim panel toward the top of the liftgate and remove the liftgate trim panel.
Position the watershield aside to gain access to the rear wiper motor.