Dead spot.

[Scott S.]

Has anyone ever had a "dead spot" on their wiper motor ???

I've been toying around with mine (replaced motor, re wired) and sometimes it still won't operate.

I read the article about taking the switch apart to clean it and was puttering around with it today.

The pump runs, and I was figuring out how much of a task it would be to pull the switch when I simply pulled on the arm and everything started working. 

Operated the switch a few times, and everything seems fine.

Maybe she's just being temperamental ???    

[cbolt]

When mine did that it turned out to be a bit of corrosion on the wiper transmission. The "ball" where the pivot happens needs to be grounded and the light corrosion prevented it from working all the time. 

[Scott S.]

Could be dirt.... ????

Like I mentioned, the wiper unit is new. I just replaced it last fall. Also cleaned all the workings.

It almost seems like if it sits for a length of time without use, the arms slip lower and maybe open that contact ???

But once I start using them regularly, the problem goes away. 

[Dtret]

2 hours ago, Scott S. said:

Could be dirt.... ????

Like I mentioned, the wiper unit is new. I just replaced it last fall. Also cleaned all the workings.

It almost seems like if it sits for a length of time without use, the arms slip lower and maybe open that contact ???

But once I start using them regularly, the problem goes away. 

 Could be just another high quality part that the stores sell. Gotta buy 3 to get 1 good one. 

[Robnhood]

On 8/13/2025 at 4:54 PM, Scott S. said:

Has anyone ever had a "dead spot" on their wiper motor ???

I've been toying around with mine (replaced motor, re wired) and sometimes it still won't operate.

I read the article about taking the switch apart to clean it and was puttering around with it today.

The pump runs, and I was figuring out how much of a task it would be to pull the switch when I simply pulled on the arm and everything started working. 

Operated the switch a few times, and everything seems fine.

Maybe she's just being temperamental ???    

A few years ago, I bought a brand new car that ended up having a dead spot.

It sucked explaining that to the dealership and getting it fixed.  Not to mention the frustration of not getting my new car to start.

[Scott S.]

22 hours ago, Dtret said:

 Could be just another high quality part that the stores sell. Gotta buy 3 to get 1 good one. 

See that a few times.