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Wiper Circuit Breaker


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Sounds more like there's an issue where the wiper motor is drawing way too much current and the circuit breaker is doing what it should, tripping. Either the motor is going bad or there's an issue with the linkage binding up.

The easy way to check would be to measure the current going through the jumper wire, and if it's over 5.5A then the breaker isn't the problem. But not everyone has an ammeter handy...

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You could always pull the motor and bench test it. I'd say rust in the linkage probably isn't likely in your case, but sometimes not using things can cause them to seize up. Sitting doesn't usually do in electric motors unless dirt or water got into it but I don't know that would cause an overload.

My MJ's wiper motor is definitely getting tired, but at 330,000 miles it's not a huge surprise to me. You could always splash some water onto the windshield to see if the wipers pick up speed. Mine don't always like wiping a dry window. 

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This blasted heat, coupled with me working 60+ hours, has me not doing much with my truck since I had it inspected. I will have to dig into it, as soon as I can catch a break. Thank you much! Current miles on my Comanche is 105,000.

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29 minutes ago, gogmorgo said:

Sounds more like there's an issue where the wiper motor is drawing way too much current and the circuit breaker is doing what it should, tripping. Either the motor is going bad or there's an issue with the linkage binding up.

The easy way to check would be to measure the current going through the jumper wire, and if it's over 5.5A then the breaker isn't the problem. But not everyone has an ammeter handy...

An ammeter, can you point me into the right direction as to where I can buy one? All of this is 'greek' to me, but by me buying this vintage of a vehicle, I must learn a whole new set of skills and I plan on keeping this truck, for quite some time.

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Any decent digital multimeter has a 0-10 amp scale you can use inline to check the motor's amp draw. Open the wiper cowl and do a visual first. Check the linkage and bushings - the bushings will most likely be shot. Pop the linkage off the motor output shaft and see how the motor runs w/o the load too. Wiper motors are an easy to find junkyard item..

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I would have a signature, stating what I have, but I simply can not locate that functionality on this site. Maybe its because of me being a rookie, on this forum... I dunno!

 

Originally sold in Henderson Nevada, just titled in Pennsylvania, one month ago: a 1987 Jeep Comanche, factory built - Laredo (verified by HOrnbrod), 4x4, 5-speed AX15/NP231-23 spline/SYE <--- fully rebuilt, before the swap. A new Spicer built rear driveshaft, lifted by 6.5 inches, rear axle a Ford 8.8, front Stock, gearing ratios require to be matched yet. 33x12.50-15 rubber. Wheels aftermarket Aluminum, with a -19mm offset <--- I think, they were on it, when I bought it. JCR Offroad Crusader front and rear bumpers, along with their Roof Rack, all three coated with Lizard Skin coatings. I could go on and on, but, that is the nuts and bolts, to its current status.

 

It will only get better, as time and money allows.

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13 hours ago, cruiser54 said:

See if the blades move back and forth by hand. It's common to have the little bolts holding the motor on to the linkage assembly to work loose also. This causes a bind. 

 

If it's an 84 to 90, I have a ground upgrade that helps. 

Anything that helps, I am all for it!

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At the motor you will have a ground wire.

That one runs across the firewall to the right inner fender, across the radiator support, along the driver's inner fender to ground there. 

 

Long run with small wire. I run one from the ground wire at the motor to one of the wiper pivot bolts.

 

 

wiper motor ground.jpg

wiper motor ground-001.jpg

Wiper motor ground-002.jpg

wiper motor ground-003.jpg

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Tomorrow, I am going to scrounge up a wiper motor assembly from a friend.  And a unbroken cowl grille, a pair of Cherokee side mirrors and a one piece front axle shaft, to eliminate the two piece axle shaft / CAD, on the front differential, from yet another friend!  

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Just like how most folks think that the older Polaris ATV's where Made in America... the wool was pulled over their eyes. The oil pump on my 2-stroke Scrambler, on the inside 'cast into it' it read 'Made in Italy'... lol!

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