Yes i used a big fansy word to describe my problem. The wipers in my 88 are haveing some issues. every so ofter when i turn the wipers on nothing will happen, then if i turn the switch to high, they will twich and then go to working. its getting more frequent now. so my question to yall would be is it the switch, the motor, or something else to check?

 

You would think if you had good battery voltage it would be the motor. It might be dying seeing as how it has to catch, so it may take a little more electricity to get past that catching point. If that makes sense. Thinking of the top of my head here.

 

Have you checked the grounds?


Does it make any difference if you hit the dash?

 

voltage test your switch and the connector at the motor.

 

ok a little more info, im thinkin its the motor but i havent really had time to check anything because of work. my volt gauge showe about 15 volts and it fires right up so i wouldent think thats a problem, i tried smacking the dash and that didnt do anything, i unplugged it in the lot at work today and the connections look clean, I did notice that when it acts up, i see the volt meter twitch a little also, im thinkin i may have a short in the motor

 

Sounds like the motor there. I was thinking the resistance in the motor increased somehow to cause the need for more voltage to run it. I suck at electricity, almost failed my highschool electronics class, the teacher stuck us on a computer to learn everything, he never taught one bit. I only passed because all of us in the class would help each other out on tests and stuff, and i mean EVERYONE helped.

 

I've had the same issue with my wiper motor in the past. Turned out to be the brushes inside the motor were corroded and sticking. Took it apart and cleaned it up and worked good again. Worth a check.

 

hmm that is worth a check, i was thinking a dead spot in the windeings or a short. they were working fine today. priced one out at my Napa, 60 bucks

 

When I bought my 1987 F250 back a few years ago my truck had the same trouble. High speed and nothing else. After changing the wiper motor and no change. I found out there is a controler behind the dash about 2" square that connects to the wiper switch. There isn't anything listed in the auto parts stores about the controler and the ford dealership listed it but didn't have a picture or location. I ended up looking behind the dash of a junked Ford pu and found the controler. Changed the controler and no more problem. This would be a truck with intermittant wipers.

 

Check the little ground wire on the switch body itself. I had the same problem and bought a new motor for it. When that didn't help I stopped at the upull and grabbed a differnt switch. When I was swapping it out in the parking lot I found that the short black wire on the switchbody to the steel frame in the dash was broke. I fixed it and all was good.

 

typical symptom of a bad delay wiper module. if you have delay wipers, change the module and everything will work properly again.

 

all right thanks guys, i finally have a day off tomorrow so ill pull it in the shop and do some checking, ill let ya know what i find

 

Hi, I just bought an 84 250, and Im having the same issue...just High speed, My 88 Bronco the motor itself was bad...but anyway, will any delay box out of any 80's-91 Fseries work? Thanks




84' F250XL 2wd Supercab, 6.9 IDI, T-19, 3.54s
88-Bronco XLT .040 351w, GT40s, C6, 4.10s 55k original miles

 

It's the wiper delay module located under the dash. It's a little black box. You can replace it with one from a junker, or re-solder the circuit board. I chose to resolder. Here is what's happening: We are all used to releasing our parking brake by just pulling the handle and the pedal slams upwards. Well, the wiper delay module is just under the dash where the parking brake pedal slams into. Over time, the solder joints on the circuit board loosen up and you end up with problems; like high speed only. remove the box, open it up, resolder all the joints. And after you fix it, train yourself to release the parking brake with your foot on it so it doesn't slam into the bottom of the dash. I have not had any wiper issues for several years. good luck.

 

wow. wish i would have known that earlier.... after replacing the motor, switch, and all electrical connectors im still having that some problem. Sounds like an easy enough fix... Along the lines of parking brakes, I heard that if you have to push it all the way to the floor to engage that its out of adjustment. The only thing I can find on here is that they need to be adjusted. How does one go about doing this? Thanks guys! I cant believe how much im learning about these trucks from this site!