[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
RE: Wiper Diagnostics
I thought the same thing myself ... but as I told Tom in a direct
e-mail, the clue that the intermittent wipers seems to work exhonerates
the switch in the wiper mechanism ... my thinking is that the wiper
switch in the steering column has a problem ...
San Jose, CA (USA)
> If you take the motor apart, you'll find a large copper track covering
> around 150 degrees. The way the motor works is that volts from the
> switch (interval or normal) start the motor running and the arm starts
> to move. After a few degrees of movement, an internal wiper contacts
> the copper track. Even if power is now removed from the switch, the
> motor will continue to move (powered via the copper track) until the
> internal wiper falls back off the end of the track - in the 'park'
> Two things can happen:
> a) The internal wiper becomes misregistered with respect to the
> output spindle, locating the 'park' position 90 degrees out.
> b) The copper track can wear through, especially in vehicles in
> which the wipers have been used a _lot_ in interval mode on a
> relatively dry windshield.
> Phil Payne
> Phone: +44 385302803 Fax: +44 1536723021
> During Demon problems - copy critical mail to