Passenger side front power window not working

Tiny
BW74
  • MEMBER
  • 2003 MITSUBISHI GALANT
  • 2.4L
  • 175,000 MILES
New motor and regulator. If I wire direct from battery, window goes up and down no problem. Back probing motor hookup shows 12v all the time. If you toggle window switch it shows 12v one way and nothing the other. Another weird thing is if you use battery and leave window down then plug up harness to motor and turn key forward window goes up by itself.
Sunday, July 7th, 2019 AT 7:00 PM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning,

This sounds like a bad window switch.

Did you check the voltage from the switch when commanding up and down? There should be no power to the motor when the switch is centered.

I attached a diagram of the windows for you to view. Make sure there is no power to both wires going to the motor.

Roy
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Monday, July 8th, 2019 AT 2:47 AM
Tiny
BW74
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Yes. Probing passenger side harness I am getting 12v constant. Then rocking switch one way its still 12v then the other nothing.
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Monday, July 8th, 2019 AT 6:09 AM
Tiny
BW74
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I also tried back door switch up front on power and no change. I am thinking master switch.
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Monday, July 8th, 2019 AT 6:10 AM
Tiny
BW74
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I was using master switch to test this probing harness on passengers side.
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Monday, July 8th, 2019 AT 6:23 AM
Tiny
ASEMASTER6371
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Yes, it could be. If you changed switches, then yes, the only thing left to provide power is the master switch.

Roy
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Monday, July 8th, 2019 AT 6:27 AM
Tiny
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So correct me if I am wrong, but should there be constant power to passenger side switch all the time?
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Monday, July 8th, 2019 AT 7:03 AM
Tiny
ASEMASTER6371
  • MECHANIC
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The switch, yes. The motor, no.

Roy
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Monday, July 8th, 2019 AT 7:51 AM

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