Mechanics

POWER WINDOWS - MASTER SWITCH - FAULT OR NOT?

Toyota Camry

Hello there

I have a Camry 1992 3.0ltr V6 saloon.

The rear left power window has stopped working. I have replaced the motor and regulator.

The window will go up, but not down. To check it wasn't a faulty motor or regulator I tried a different one and the same thing, moves up but not down.

I tried a different switch, still the same.

I then got my test meter out and found the following.

From the rear door power window switch I am getting a voltage at the motor for both up and down actions.

From the master switch on the drivers door I am only getting a voltage on the down action.

After thinking about this for a while I can only presume that the master switch allows for the voltage polarity to be reversed dependant upon whether the switch is being pressed up or down.

So, If I am correct, the master switch is not allowing a ground connection for the down movement.

With the master switch taken out of circuit I do not get any voltage at the rear door switch.

I then thought that I could prove this by finding the voltage for the down connection, and take a flying lead from the other motor connection to ground. This blew the main 30amp fuse, however, I didn't disconnect the cable from the motor terminal, so this might have caused a dead short with the presumed faulty master switch.

Could someone tell me if I am on the right track with this one, and if not, what might be the problem other than a faulty master switch.

Many thanks
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ARDV8
August 25, 2007.




Change the master switch this switch controls the power to the subswitches the cut switch portion of the main switch is the one responsible for reversing polarity by using the ground circuit.
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Rasmataz
Aug 25, 2007.
Many thanks for the quick reply.

Is there anywhere I can buy a good workshop manual for the car. Over here in the UK they are hard to get.

Posted at Sat Aug 25, 2007 6: 51 am
By rasmataz, Certified 2CarPros Master Technician
(308) Give Feedback | Votes: 41

ARDV8 wrote: Many thanks for the quick reply.

Is there anywhere I can buy a good workshop manual for the car. Over here in the UK they are hard to get.

If you look down further after your post you'll see Manuals for your Camry

Click Manuals
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Have a nice day and come again

Find a manual for your Camry Repair Question.

Tiny
ARDV8
Aug 25, 2007.

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