My subject van is driving me nuts, the wipers work 50% of the time
great, but after some use, typically using delay, they will stop down
and then won't work again unless I switch to "HIGH" on the stalk.
Even "LO" won't work. If it was the motor, I wouldn't think it would
work intermittantly. It could be stalk but has anyone had this happen
and fixed it? I have the service manuals and it give a long process
of tracing the power through the cramped confines which I started
doing but had trouble getting reliable readings and ran out of time,
so I'm hoping someone has a bright idea to save me some effort. My
only plan now is to hook a battery charger to the van, run a hose to
the roof so I can operate the wipers and wait for it fail, then try to
figure out where the problem is....
Thanks in advance
I have the same problem with my '87 DeVille. I 'think' the problem is
with the PCB in the motor. Here is why I think that: when I first got
the car the motor quit during a heavy rain storm on a crowded
interstate. Somehow I got from the speed lane to the shoulder without
running over any of the 18-wheelers I was travelling with. I replaced
the motor but the PCB in the replacement was different, so I used the
PCB in the OEM motor. Since then I've had that problem you describe.
It doesn't rain much here so I never had any great need to deal with it.
It works well 90% of the time. I rain-x'ed the windshield which helps.
The trouble has the earmarks of a ground problem.
Hope someone can help.
it sounds like the board not the moter the circuit board behind the black
plastic cover on the wiper moter if i remember wright there should be 3-4
#15 torks screws you take out of the cover take and unplug the wires and i
think there is some screws in the board you take out. i could be wrong it
has ben a long time since i changed my board it is not hard at all to
change. my truck had a problem where they would work some times or they
would stop at any time in any position you can only get the circuit board
from a dealer only i think it was around 50-60 bucks hope this helps
Thanks all -
I did exhaustive diagnotics, removed the stalk per the book and
tested, decided as everyone suggested that it was the motor
controller. Geeze, after I tore apart the van... Ordered one at
parts store, will see if that fixes it.
On Mar 5, 5:35 pm, firstname.lastname@example.org wrote:
Well, we're going on a long trip soon and the reman'd one was cheap so
I'll replace and send the core back to them to fool with. I think it
was electrical not brushes, but then I guess I'll never know...
Thanks for help.
I installed the new pcb/motor in the van, it works now! Sweet. Been
a pain in the rear for some time now. The book indicated you should
install the thing with it indexed between delay strokes, but we found
it easier (after a failed attempt) to just let the motor park
position, then attach the wiper linkage. Here in Houston we get some
regular rainfall and the fix will be nice to have done. The parts
store took the old one as a core.
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