Could be one of several things.
1. As the load on a motor increases its current drain increases, so it
could simply be excessive load that is affecting the other things.
2. It could be a bad connection in the green circuit e.g. corroded fuse,
but in your car the wipers (and the heater motor) should be powered off the
ignition switch in the accessories position (check this) via the
white/green, an in-line fuse and the green/black. If only these two (and
the screen washers) were affected I would say check the ignition switch -
white/green - in-line fuse - green/black circuit and the four-way connector
in the green/black. However you say that lights are affected as well, but
pretty-well all lighting circuits come direct off the brown. If there were
a bad
connection here then everything would be affected, and headlights would
cause as much problem as wipers.
3. The dim glow from the ignition warning light could be indicating a
problem with its diodes, or it could be indicating a problem in the brown up
from the solenoid to behind the dash.
Put your hand on the motor while it is working, can you feel it rocking back
and fore? A little is normal. Now remove the wiper arms from the spindles
and try again. If is is rocking as much as before at much the same speed
then stiffness in the mechanical linkage from wiper motor armature to
rack/wheel boxes is indicated.
Without the load of the blades the wiper motor should go faster and with
less rocking. If
this is the case then start testing brown, white and green circuits for
voltage on and off load, looking for bad connections.
Remember you may have more than one fault.
PaulH.
----- Original Message -----
From: Scott Allen <scottinarl@hotmail.com>
To: <mgs@autox.team.net>
Sent: Friday, January 19, 2001 6:11 PM
Subject: Problem: Slooow Wipers
> All,
>
> I've had this problem for a bit now, and it's driving me to distraction.
> When I use the wipers on my 74 1/2 BGT they're real, real, slow. If I put
> the switch into the second faster position they're even more slow.
>
> It was suggested that I may have old grease fouling the motor, so I pulled
> it apart and cleaned it with no change once it was back together.
However,
> I've always thought it was electrical, as I'd noticed the lights dim or
> heater blower slow down when I turned on the wipers, and last night I
> detected a faint glow in my alternator light when they were on. I think
> there's a load problem somewhere in the circuit.
>
> Anyone have a similar problem and worked through it? Since I'm sorta new
to
> B's I'd appreciate any pointers on where to begin to look...
>
> Thanks in advance,
>
> Scott Allen
> _________________________________________________________________
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