Philip,
Obviously, the motor needs a source of current (hot wire) and a return
(ground) to operate ( discounting possible poltergeists.) However, since
switching is virtually always done in series with the "hot" wire, I think
you can disregard a ground problem when the motor always runs.
I would disconnect the wire from the switch to the wiper. If the wiper
still runs,you have a short in the wire or a mis-connected wire. If the
motor does not run, you have a bad or mis-wired switch.
Hope this helps.
Jim Snyder
TR6, under construction.
>> Reply-To: peb3@cornell.edu (Philip E. Barnes)
> Content-Length: 619
>
> Since we are focussing on wipers this week, here's my problem; the wipers
> won't shut off at all. When the ignition is on, the wiper motor runs, even
> when the switch is in the "off" position. Switching to the higher speed
> speeds up the motor. I have tried spray cleaner on the switch, as well as a
> new switch, with no result. On a very rare occasion I can tease the switch
> and they will stop. Is this related to the park switch/ground problem, or
> another new failure mode?
>
> Philip E. Barnes '71 TR6 CC61193L
> Cornell University
> Newman Laboratory of Nuclear Studies
> Ithaca, NY 14853
> 607-255-4951
> peb3@cornell.edu
>
>
>
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