Continued problems with intermittently working power windows on '89 Toyota Cressida

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To recap for those in rec.autos.tech who I forgot to include in my
previous post:



The problem has persisted with the windows, even though the battery
connection is now tight and no further issues with the door locks or
clock as previously noted. I've observed that turning off the car and
restarting will bring the windows to life again.

What could be causing this? Wondering if the drivers door switch is a
"master" for the others and could be getting hitchy and thereby
affecting all the others, but why would a de-energize & re-energize
make a difference? Or, is there something in-line between vehicle
power and the doors that could be causing this intermittent behavior?

Thanks for all input.

Re: Continued problems with intermittently working power windows on '89 Toyota Cressida

On 12/17/10 5:45 AM, in article
90d2a670-3502-4124-8a0a-0c696d11bc5c@o9g2000pre.googlegroups.com,


Usually when there is a problem with things that all originate in a door,
the first place to look is for insulation breaks in the wires that run from
the body to the door.  The power windows & door locks all originate with a
master controller in the driver's door, so start with that one.


Re: Continued problems with intermittently working power windows on '89 Toyota Cressida



Have you considered the possibility of cold solder joints on the power
window controller?

I once had an Accord with windows that behaved similarly to yours. My car
was a coupe, so I only had two that played these games, but the problem was
the board in the control module was riddled with cold solder joints.

And, yes the drvier door switch is the master. You need to get inside of the
drivers door to move forward with this repair.






Re: Continued problems with intermittently working power windows on '89 Toyota Cressida


If you have the door panel off disconnect the plug going to the motor
& test for voltage, OR put 12v directly on the motor and see if it
works. One tab should make it go down and the other should make it go
up.

Re: Continued problems with intermittently working power windows on '89 Toyota Cressida


Looks like they also list a door window relay too.. That could be the
problem too.

Re: Continued problems with intermittently working power windows on '89 Toyota Cressida



The driver's master switch controls all of the power windows and locks.  I'd
start by checking the master switch, particularly if you often drive with
the window down and moisture gets on the switch.    The most common cause of
problems with all of the doors and windows is the master switch so get a
wiring diagram and check the terminals for continuity.
--

Ray O
(correct punctuation to reply)



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