Passenger window rolls down, not up— switch is good

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Billingstitan

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Damn i miss old school roll up windows.

89 K1500 silverado

I cannot sort this out. I’m usually an ace w electrical, but i cannot get my passenger window to roll up from the passenger side switch.

Goes down fine; door locks are fine; switch is fine, and i am getting power through the harness.

Driver side rolls it up and down no problem.

Ignored it forever, but my passenger door got hit, so i swapped it w salvage, hoping it might fix the window issue as well.

Nope.

Since I got everything apart, I thought i’d ping the hive mind and see if someone has an idea of where my issue is? Other than the nut behind the wheel, lol.
 

Billingstitan

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No sound at all, and pulling up on the windows doesnt help.

I mean, I can slide over to the driverside door and that switch works fine.

I’ve swapped switched to make sure it’s functional. Tested power again today when i hit the up switch and it is fine.

It’s a damn hesdscratcher —
 

PlayingWithTBI

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I mean, I can slide over to the driverside door and that switch works fine.
Looking at the wiring diagram for my 88, the circuit goes from the left side, through the right side switch. If you can roll the window down from the right side but, can't roll it up, you have power going to it from the pink wire. Since you can operate it from the left side switch, the blue wire and tan wire from the there are both good, as well as the blue wire and brown wire. That leaves the switch.

An old saying: If you eliminate all possibilities, what remains, not matter how improbable, is the answer :33:

That's my opinion, I may be wrong.:rolleyes:

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Hipster

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Would have to think the switch as well. It reverses polarity to the window motor. One side has power with the window on the way up(blue wire) and the other has power on the way down (brown wire) according to the diagram Tbi posted. Test power on both sides of the switch to make sure the switch is switching. You have a neutral switch position, power down, and power up. It looks like the passenger side switch is shunted to feed power directly through the driver side switch via blue/wht and the tan alternately instead of the pink wire.
 
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Hipster

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diag.

A. shows the left switches as normally open in the neutral position.
B. shows that the passenger side is shunted to the left side switch, closed circuit with the left switch while the right switch is in the neutral position.
C. A to E switch contact more than likely the problem.
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89RCLB

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Possible ground issue? On your power door lock switch, continuity test from the orange/black wire to a good ground source, should have continuity (as you indicated the power lock works fine on that door). Now, on your window switch continuity test from that same pin location on the switch to ground and operate the switch, you should have continuity. If you don't then you have a ground issue with that wire (it's either white or very light grey). You can also jumper from the orange/black wire to that white or light grey wire and test window up/down operation. Let us know. HTH.

Edit: this is on my 89 GMC so wire colors may vary.
 
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