Mirror switch only work up & left, burned circuit - Toyota Nation Forum : Toyota Car and Truck Forums
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post #1 of 2 Old 06-14-2019, 05:23 PM Thread Starter
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Mirror switch only work up & left, burned circuit

I've got a problem with the electric adjustment of the side mirrors.
The panel works fine for adjusting (both mirrors) left and up. But down and right doesn't work. also retraction works.

I assumed there was something wrong with the switch panel. since both right and left mirror work and all servos work. My guess was that the panel where the current is switched would be the problem.

When i disassembled the switch i found that the switch was burned. see pic, marked in white.

Then I got a replacement switch that I installed..... aaaaaand.... It didn't work... I disassembled the switch again and opened it up, and it was burned in the same spot.

problem with ground somewhere...? or something else?

So anyone got a clue what's wrong? where to start looking?

The car is a camry 2000, v6.

all help is welcome!
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Markus Bohlin is offline  
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post #2 of 2 Old 06-15-2019, 07:28 PM
'00 4 Cyl. Auto Camry LE
 
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Hi Markus,

The switch works by (switching) positive and negative feed to the servo motors, depending on up/down, or left/right movement.

If the feed is working correctly in one direction: knowing which polarity is carried on the wires depending on switch position is important - so you can test wire pairs -> isolate & test for short-to-ground.

I would start by disconnecting the wiring connectors @ the mirrors and switch, checking to see that each wire from the switch connector -> to the appropriate mirror connector shows continuity as expected, and -also- testing to ensure that wire supplying power to the servo motor is (isolated) / is -not- showing continuity to ground, when tested. * It shouldn't, if both the switch and servo motors are disconnected.

Checking the condition of the connectors, and wiring for any charring, discolored or missing insulation, etc. - especially where wiring passes through or by any metal, is always a good idea also.

Hope this helps.
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