Re: wiper fuse keeps blowing

[Steve Sherman <Steve.Sherman@nsc.com>]

As I recall, Steven is right; there is a separate wire for low vs hi
speed.

A goo test I would think, is to pull the el connector off the motor,
then see if hi speed blows a fuse.  If it does, it's a wire or switch
problem.  If not, then the motor.

HTH

Steve

"Buchholz, Steven" wrote:
> 
> ... just checked out the wiring diagram for the '83 QTC ... What I found was
> that there are separate taps on the wiper motor for normal vs. high speed
> operation.  Normal speed is powered by the Grn/Blk wire attached to terminal
> 53 on the motor, while high speed is powered by the Grn/Yel wire attached to
> terminal 53b.  The wires from the fuse box to the wipers are on connector
> "C" (pins 6 and 16 respectively), and the wires that go to the wiper switch
> are on connector "E" of the fuse box (pins 18 and 21 respectively).  The
> wires should be the same color on either side of the fusebox.  BTW, the pin
> numbering on the wiper switch is exactly the same as that at the motor (53
> and 53b).
> 
> While anything is possible, the fact that your wipers work on low speed
> tends to indicate that the wiper motor itself is OK.  I'd look for some sort
> of short circuit in the harnessing ... perhaps testing at each connector
> into the fusebox.
> 
> Good luck Dave!
> Steve Buchholz
> San Jose, CA (USA)
> 
> > -----Original Message-----
> > Patient: 83 urquattro
> > Problem: wiper fuse (#11) keeps blowing when high speed
> > wipers are engaged
> > Configuration: old style fuse box with stock wiring.
> >
> > The wipers and washers work in every other mode, but when the
> > high speed is
> > selected, the fuse blows instantly. I checked out the wiring
> > schematic and
> > it
> > appears that when high speed is selected, all the current
> > goes through the
> > stalk switch and through the motor. Any tips on how to debug
> > this problem?
> > Should I try to measure the current the motor is drawing? Or
> > should I buzz
> > out continuity on parts of the circuit? Or rig up a fused
> > test wire and see
> > if
> > the  wiper motor will run in high speed mode?
> > -
> > Dave Lawson
> >