Strange problem with GTS power window fixed

[dave6666]

I'm going to call this strange at least. The driver's side window was working intermittently. Common culprits are:

-> Window switch
-> Door jamb wiring
-> Motor/regulator assy.

Took the switch off and bench tested all the contacts via the wiring diagram. Worked flawlessly.

Pulled the door panel to check the motor. Put a voltmeter on the wire from the switch and got +12V or -12V every time. The motor would twitch with switch up, and nothing with switch down. Via my hand on the motor to feel this.

Put a battery charger on the motor and it went up and down without fail.

Well, what is left???

Had recently bought a faceplate off ebay that had switches on it. Why not change a switch? It fixed it.

So the strangeness is my old switch worked flawlessly with a meter connected - checks good! - but did basically nothing with the motor connected.

A weak switch.

For your troubleshooting files...

Update:

Should have been a surgeon. Dissected the switch. One contact shiny, one black. Voltmeter not always good for troubleshooting switches I guess.

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[Viper Wizard]

It is always nice to put your finger on it!

 

[IEATVETS]

I have the exact same problem and it has been driving me nuts. Fuses are fine. The wiring looks intact with no kinks or cracks. Switch is fine. I will have to try this for a fix.