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90 F-150

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  #1  
Old 07-20-2019, 10:15 PM
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90 F-150

I have about drive myself crazy over fixing my son's windshield wipers. After fixing several delay boxes and having them to quit, I would Iike to know how to wire around it and just go to a three speed non-delay set up.

Any help would be greatly appreciated.

Thanks
 
  #2  
Old 07-21-2019, 02:15 AM
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If it was mine...

I'd open up the motor & bend the contact fingers just a tad to improve their tension and maybe clean up excess debris and grease.

There also is a procedure here on site on repairing the speed selector switch on the stalk, if I could find it.

Failing that, I'd replace the multi-function switch in it's entirety.

Sorry, can't give you the rewire info you want, but you hadn't gotten anything so far.

Good luck.
 
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Old 07-21-2019, 06:39 AM
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Originally Posted by Scndsin
If it was mine...

I'd open up the motor & bend the contact fingers just a tad to improve their tension and maybe clean up excess debris and grease.

There also is a procedure here on site on repairing the speed selector switch on the stalk, if I could find it.

Failing that, I'd replace the multi-function switch in it's entirety.

Sorry, can't give you the rewire info you want, but you hadn't gotten anything so far.

Good luck.
The problem with that is he has a 1990 model so the wiper switch is on the dashboard.

Maybe its it’s just been my good luck but I have never had a wiper delay module go bad. More often than not it is the motor that has failed. I got a couple junk “remanufactured” wiper motors from Napa. The last one I got was a Cardone and it has been great so far. What is failing in the modules? Could the motor be pulling too much current burning them up?

The non intermittent wiper is a two speed ( low / high ) setup.
 
  #4  
Old 07-21-2019, 07:03 AM
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Originally Posted by My4Fordtrucks
The problem with that is he has a 1990 model so the wiper switch is on the dashboard...
Got it. My bad, good catch.

Still The finger contacts on the motor not riding smooth will cause erratic operation.
 
  #5  
Old 07-21-2019, 07:18 AM
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It happens.

I’m right there with you thinking the motor is the problem.
 
  #6  
Old 07-21-2019, 09:05 AM
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I just replaced the switch with a non intermittent one. It basically replaced the entire intermittent box/harness.
 
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Old 07-21-2019, 09:31 AM
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Originally Posted by minimalist
I just replaced the switch with a non intermittent one. It basically replaced the entire intermittent box/harness.
How does replacing the switch bypass the wiring to the intermittent control module?

On the ‘87-91 trucks, turning the switch clockwise is for low and high speed. Counterclockwise is for intermittent wiper settings. Couldn’t you have just not used the intermittent function?
 
  #8  
Old 07-21-2019, 09:56 AM
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Premier Gear PGW-299 Wiper Motor (New)


Price:$50.62 Free Shipping for Prime Members

I ordered this from Amazon for my 1993 and new bushings for the connecting arms. After going through 2 re manufactured units also. Works great and quite operation.
 
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Old 07-21-2019, 11:07 AM
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Originally Posted by My4Fordtrucks
How does replacing the switch bypass the wiring to the intermittent control module?

On the ‘87-91 trucks, turning the switch clockwise is for low and high speed. Counterclockwise is for intermittent wiper settings. Couldn’t you have just not used the intermittent function?

For me intermittent wouldn't work and low was on/off. High was working fine. The low/high switch plugs right into the plug that goes to the wiper motor taking out the entire control module out of the equation. If I remember correctly it will not fit the plug to the module. Now I have high/low wipers bot no delay. At a minimum it's a tool to help diagnose the issue before you replace the wiper motor. I suspect my module is fine but a wire is bad but I haven't found a wiring diagram nor the time to test the harness. Since it's working for me it's not high on my to do list.
 
  #10  
Old 07-21-2019, 09:06 PM
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I think we have tried this.

Will check, thanks.
 
  #11  
Old 07-21-2019, 11:41 PM
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I had a bad alternator cause my wipers to act erratic.
 
  #12  
Old 08-27-2019, 08:30 PM
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Changing the switch as suggested worked. Thanks for the help big guy.
 
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