Front wipers not returning to rest position (1 Viewer)

[PabloCruise]

This is a good thread!
If my wiper are not parking, and intermittent fcn is no longer, it sounds like the problem can be in the motor/transmission, or in the switch?

Is my best way to tell which item is bad is to perform the test for continuity that @Ayune lists above?

BTW, I found this video about how to repair the switch w/ a $10 relay:

 

[PabloCruise]

If my wiper are not parking, and intermittent fcn is no longer, it sounds like the problem can be in the motor/transmission, or in the switch?

Is my best way to tell which item is bad is to perform the test for continuity that @Ayune lists above?

 

[Ayune]

If my wiper are not parking, and intermittent fcn is no longer, it sounds like the problem can be in the motor/transmission, or in the switch?

Is my best way to tell which item is bad is to perform the test for continuity that @Ayune lists above?

Yes, do the test as I’ve described above to diagnose the motor’s internal cam switch.

 

[PabloCruise]

You can test to see if the problem is within the wiper motor with a simple check:

Unplug the connector at the wiper motor and test for continuity between pins 2 & 3 on the motor. These are the pins that would have the solid blue and blue-with-white-stripe wires going to them. Those two pins should be connected together inside the motor when the wipers are at any position except the parked position. For example, if the wipers are stopped in the middle of the windshield and there is no continuity between pins 2 & 3 then the cam switch inside the motor is bad.

If pins 2 & 3 are connected together whenever the wipers are out of ‘parked’ then it’s a wiring issue elsewhere in the truck.

For reference here’s a diagram looking at the face of the wire’s connector (the connector on the motor is reversed):
View attachment 2161086

Thanks @Ayune - I checked for continuity at 2 &3, and had none. This was with the wipers stopped at the "all the way up" position.

I got this picture to help people orient themselves for solid blue & blue/white:

 

[PabloCruise]

Based on my build date, I think I am in need of p/n 85110-60290.

They look to be about $200...

 

[PabloCruise]

For what it's worth - here is the failure point in my old wiper motor - note the degraded center contact point on both the disk and on the center electrode.

As this plastic cam is held on by a one way push on retainer, I had to break off the plastic shaft to get to this point. Thus, repairing the old one would not be an easy DIY proposition. View attachment 2239905View attachment 2239906

Too bad these can't be repaired. I am sure the motor still has years of life left in them.

 

[PabloCruise]

For what it's worth - here is the failure point in my old wiper motor - note the degraded center contact point on both the disk and on the center electrode.

As this plastic cam is held on by a one way push on retainer, I had to break off the plastic shaft to get to this point. Thus, repairing the old one would not be an easy DIY proposition. View attachment 2239905View attachment 2239906

Great picture! This definitely explains the failure.
Too bad the electode is not serviceable.
This has got to be one of the easiest fixes ever.
My wiper had 4x10mm bolts (captured).
Zip those loose, and then start to walk the wipers up, from horizontal to vertical to get the ball mount visible. lift the bottom part of the wiper motor up, so the ball is straight and then pull.
Easy peasy!
If you raise the wipers a little more vertical, there is a tab on the linkage to hook onto the firewall. Hook it, press new ball in!
Get the wiper motor near the mount holes - you'll have to move the wipers back down to horizontal.
4 10s, plug the new motor/transmission in and you are good 2 go!

 

[plainjanefjc]

Mine does this as well- as long as I tune them off when they are close to the low position it seems the motor has enough to go ahead and close them all the way. Some times it takes a few attempts.

 

[terryscott621]

I'm having an issue where my intermittent wipers are not functioning correctly, they are acting as if they're in low and will not return to the rest position when I turn them off. Low and High wipers are functioning correctly. I tested the wiper motor plug according to the post earlier in this thread and I do have continuity when the wipers are parked in the 90 degree position. What other part could be the culprit? The wiper switch itself?