Windshield Wipers Running

[AccessMaster]

My Classic 345 turns the windshield wipers on and off from time to time. I have heard of other GM products doing this, like my son's Astro van. Anyone know what to do about it?

[thenewkid64]

Here is a link to an aftermarket source of the motors and contolrs:

http://www.clevelandignition.com/

The system is based on grounds and that the motor will have 12 volts on one terminal or another to make it do what you want. It may be a bad switch, I know mine are poor to say the least.

[Chas]

I vaguely remember a problem with the late 80's and early 90's wiper motors. Seems it was a bad printed circuit board which may have been made worse by water intrusion. I had a 93 Suburban and a late 80's Astro that had the problem. Not sure if an A/S mh uses the same components though? Been driving my Ford PSD for so long I have forgotten most of my GM knowledge.

Chas

[59toaster]

Asuming it's a GM intermitant wiper set up.......Hehe they do it. Our 79 Blazer does it when you pop the parking brake, slam the door, hit a pot hole. Some times it will go a week and not do it and sometimes it will do it 10 times in one day. It's usualy a problem with the Intermitant wiper control modual that should be under the dash very close to the colum. They did not have very long harness on them.