Help: The Passenger Window Will Not Go Up

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I know its not the most technical or exciting problem, and seems quite boring, and not many will feel like taking the time to post on it. But, here she goes...

1994 gts-t 180k km, so she has done her time, but has been generally well taken care of.

The passenger window works fine when using the passenger switch. it goes up and down, no issues.

From the driver side, i can move the passenger window down, but not up.

I haven't had the time to do any diagnostic work yet, but from my limited knowledge of electronics, i think i have two possibilities:

1) it is the switch, in which case i replace it, and all is well.

2) it is a loose wire, somewhere between driver door and passenger door, in which case i will hate my life for a little while as i chase it down.

Does that seem about right?

can anyone recommend some tests i might try?

also, does anyone have wiring diagrams for this car? any idea what path these wires take, and which wire on the switch is what?

thanks

[ZacZerbst]

It will most likely be the switch. easiest thing would be to borrow someones and see if that fixes it. As for testing it you could use a multimeter set on ohms and check the connection in the door to the wires at the switch. If there is a reading for all the wires at the door then the problem isnt in the loom