1989 F250 Lariat intermittent wipers dont shut off any help would be great

 

If the intermittent function does not work, I would suspect the wiper electronic module under the dash.

If the wipers will not shut off at all, and you have to disconnect the battery, then I would suspect the cam switch inside the wiper motor is broken.

 

Thanks I will be playing with the truck today i'll check out the delay function is the cam replaceible or do you have to replace the wiper motor?

 

I am not sure, you probably have to replace the motor.

Here's a diagram of your particular model.
http://www.autozone.com/images/cds/g...3d800a3a5b.gif

Here's a diagram without the intermittent module. I am showing this to help you understand how the cam switch works.

You can see on the left side of the switch, when it's put in Lo, power from the red wire is fed directly to the Lo windings of the motor.

The cam switch is in the lower right part of the diagram in the motor.

If the switch is turned off while the wipers are in any position, the cam switch keeps power on them till they hit "park". In the park position, with the wiper switch off, the cam switch grounds out the Lo windings of the wiper motor. This has a braking effect which makes them stop at the bottom of the windshield.

 

thanks for the diagram it looks like the wiper motor needs to be changed