Single speed wiper motor wiring pin out
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4th Gear
Joined: May 2026
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Single speed wiper motor wiring pin out
I'm working on rewiring my 1966 F250. It didn't come with a wiper switch or working wipers. I found a working single speed wiper motor on Craigslist. I'd like to wire it to a relay if possible. But, even if I have to directly use the 2 speed switch that I got, I'd still need to know which pin on the motor is power, run and park to wire it. What are the motor pin connections? I have the original cable. The blue is closest to the gear box. The black is in the middle and the red / black stripe is farthest from the gears. Which wire is which or pin outs? It has the 4 wire plug on the other end.
Any ideas on using the relay?
What I'm thinking to do is to use a 5 pin relay. Connect the Run to the center contact 30 and Power which also runs to the motor directly to 87 NO and Park to 87a NC on the relay. This. should connect Power to Run when the relay is activated to make the wipers run. When it's switched off. Run will connect to Park and disconnect from Power. That seems to be the way that many of the switches are wired, but no one seems to know anything about single speed wiring. Will this work?
Any ideas on using the relay?
What I'm thinking to do is to use a 5 pin relay. Connect the Run to the center contact 30 and Power which also runs to the motor directly to 87 NO and Park to 87a NC on the relay. This. should connect Power to Run when the relay is activated to make the wipers run. When it's switched off. Run will connect to Park and disconnect from Power. That seems to be the way that many of the switches are wired, but no one seems to know anything about single speed wiring. Will this work?
Last edited by RanchodeNieve; May 12, 2026 at 12:32 AM.
6th Gear
Joined: Dec 2025
Posts: 6
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From: Chino, CA
@RanchodeNieve, I have a '64 F-250. Attached are 2 wiper related wiring pages out of the shop manual for a '64. Not sure if it's the same as the '66 but I would guess it's close. If it helps, great! If not, when you get a '64 you'll have a part of the shop manual... If you don't already have a '66 shop manual , they are easily found online in hard copy or PDF versions... Best investment along with a shop manual is the parts catalog - https://www.classicindustries.com/product/USB10014.html Have fun - the journey is as great as the destination!
See A Man About A Horse
Joined: Apr 2003
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From: Mariposa, Ca.
There is at least one 2-speed wiper switch, NOS, available on eBay, now, I think about 70 bucks, chump-change.
A 2-speed motor should also not be difficult to find.
This is preferable to the one-speed system, and I know, since I have one. Switch is difficult at times to locate.
If I was starting with a blank slate, I would not choose a 1-speed set-up, and that janky-sounding relay idea you mentioned.
A 2-speed motor should also not be difficult to find.
This is preferable to the one-speed system, and I know, since I have one. Switch is difficult at times to locate.
If I was starting with a blank slate, I would not choose a 1-speed set-up, and that janky-sounding relay idea you mentioned.
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4th Gear
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Sadly, I know that 2 speed or one of the later delay setups would be great. But, the single speed was really cheap and it had some missing parts on it - The wiper posts. Right now I want to work with the motor that I have. Maybe later on the upgrades. I've got so much else to drain my wallet before it hits the road..
4wd Low
Joined: Oct 2020
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My 66 single speed wiper motor
Sadly, I know that 2 speed or one of the later delay setups would be great. But, the single speed was really cheap and it had some missing parts on it - The wiper posts. Right now I want to work with the motor that I have. Maybe later on the upgrades. I've got so much else to drain my wallet before it hits the road..
Link
this thread link shows the original plug at the switch and color coded wires. I do not agree with some of the wiring discussion that followed. The plastic tongue on the switch accepted the power wire from the ignition switch. The other 4 prongs accepted the wiper harness. Three of those wires went to the wiper motor and the white wire was a ground for the dash wiper switch.
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