Windshield Wipers Sword-fight

Try video again with the windshield wetted down. To me looks like 22 year old wiper motors and blades running on a dry windshield. Which by the way may also scratch a tough to find and replace windshield.
Ky

 

Did you remove the wiper arms or just the wiper blades? Because it's obvious that there is some adjustment needed. I have a huge writeup in the service manual on this but it's better to narrow it down if possible.

Also, do the blades touch each other in the parked position? Here's some wiper arm basics in the parked position:
- The driver wiper blade is over the passenger wiper blade.
- The passenger wiper blade at the blade pivot point is 7/8" over the black cowl trim.
- The driver wiper blade at the blade pivot point is 1-9/16' over the black cowl trim.
- The passenger wiper blade should not touch the cowl trim while going to the park position.
- The driver wiper blade should not touch the passenger wiper blade while going to the park position.

Finally, torque at the wiper arm might be a factor too.

 

Glad you have the manual. Have you done the 3 tests in the manual for the Wiper Motor, Switch and Wiring?

Here's my train of thought.
- The driver motor seems fine on outward stroke and stop.
- The passenger motor seems to stutter on both the outward stroke and stop.
- The controller is fine since it is trying to do the best based on its inputs.
- Assuming the above to be true, it's either a bad power connection or a bad syn signal at the passenger motor.

Check for connectivity and corrosion all over but specifically at 2 places:
- terminal 5 (passenger motor) to terminal 19 (controller) for the syn signal
- terminal 7 (passenger motor) to terminal 5 (controller) for the power signal

Make sure you have a good battery. Unfortunately, that's all I can deduce at this point. Let us know how it goes.

 

The passenger wiper seems to stutter in both videos while the driver wiper barely stutters in the first. I'm still calling out the passenger motor as it definitely stutters in all 3 videos.

 

You may have a bad wiper control module or one of motors is going bad causing them to get out of sync. I know the fronts on Gen 2 are both minivan rear wiper motors from the same model era.

 

I had the same issue years ago. If I remember correctly, one side has a positon sensor and when the blades meet your sensor isn't working correctly. I know I was able to Frankenstein a setup back together much cheaper than buying a new unit but it's been so long ago I can't remember how. I think the motor is the same for both sides but the mounting bracket is different. This issue is a pain to deal with and you REALLY need a service manual so that you're going down the right path.

 

My memory of issues posted on the forum was that if there appears to be a problem with one of the motors, then it is usually caused by a problem in the other one.

 

I am not a viper owner yet however this seams to be a major issue with them. Of the 3 I looked at with under 30k on them 2 have had this issue. I have done a lot of research on this problem. So here goes.
It is one of these issues.

Most likely cause is the Passenger side motor. This motor has the brain in it.

Then the drivers side motor.

Then the timer which I think is in a false floor under the passenger footwell area.

The timers usually don’t go bad.

Tighten the nut holding the arm to the stud. Was it loose don’t go nuts a turn or so?

Lastly it could be wiring related but these cars don’t see much bad weather but u never know.

Some have been able to fix there bad motor. I think the magnet that senses the wipers position fall out. (But I am not 100% on this). There is a procedure in the repair manual which explains how to test for which motor is bad. I hope this helps.

For now remove the passenger wiper arm from the post.
At least u will be able to get buy with the drivers blade if u get stuck in the rain.

Could u do me a favor and post a pic of how the wiper motors are mounted in the cowl area. I cannot find a pic of there location anywhere and are they easy to change or a project?

This has prevented me from buying 2 Vipers a 94 and a sweet 96 Rt10 I am still searching!
Good luck

 

That sucks! I'm at a loss as well but the only option left is the controller.

 

How do you know that the problem is not the driver's side motor? If you are now confident that the problem was not the passenger side motor, you could try swapping the new passenger side motor with the driver's side motor after swapping mounting hardware. Or you could just change out the controller, and if that doesn't work, then replace the driver's side motor.

 

I don’t think you can use a passenger side motor in place of the drivers motor. They are different. Can u return the passenger side motor and get the drivers one?

 

need shorter wiper blades perhaps?

 

Were you able to fix this issue? If so, what was the resolution?

 

Dumb question I know, but is there a difference in the wiping pattern between year models?

On my 96 GTS, the driver side wipes 2 times more often than the passenger. They don't contact each other, they just don't perform according to the video you posted, and the video of Doug Demuro's 97 GTS wipers.

Was just wondering if there indeed were a difference.

 

So here's my wipers sequence on my 96. Definitely different

 

The wiper motors and control module are the same part numbers for 1996 & 1997 according to the online parts lists.

 

I have THE same issue on my 96 GTS, What is the part # for the drivers side wiper motor if you don't mind

 

https://www.roeracing.com/downloads/