wiper prob's

[poncho]

so the wipers in my '62 pontiac have gotten a workout this year already, and they stoped workin'!!they will come on by themselves from time to time when i leave the switch in the ON position. but i cant turn them off once they go on,its a 2 speed switch with the squirter button in the middle.i can change the speed,but not turn 'em off. i have to pull over and disconect the power to the wiper motor..i have a spare switch that i tried to day but no luck..so what do ya'll figure is the problem?how can i fix it?is it a bad ground?lemme know,,,,thanks...craig

[RustyPile]

The park switch (located inside the gear housing) is bad...

[poncho]

b.t.t.t http://www.jalopyjournal.com/ubbthreads/images/graemlins/smirk.gif

[Deuce Roadster]

[ QUOTE ]
The park switch (located inside the gear housing) is bad...

[/ QUOTE ]

I agree.........had the same thing happen to a Chevrolet pickup....... http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif


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[Andy]

I wonder if the wire to the switch has a short. All the switch does is complete the ground. Next time it happens,try wiggling the wires to the switch and see if it quits.

[Bruce Lancaster]

Yeah, it's the park switch. Probably not even bad, likely just stuck in some petrified forty year old grease. It's inside the motor assembly, and is much like a set of ignition points--get to it, free it up and grease it, clean its contacts, and you'll be home free.
The why of this: Your wiper has TWO power leads, one that is switched on/off by the dash switch, the other constantly hot. When you turn off the wipers, the extra wire keeps them on until they reach their lowest position, at which point a cam on the drive works the park switch and shutserdown. Utterly baffling until you know the thing's in there.