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Passenger window down short ?

Old 02-28-2019, 12:18 PM
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Passenger window down short ?

Okay I have a weird issue if anyone else has experienced this. If I try to put passenger window down with driver side switch it acts like a short, going up is fine. When I use the passenger switch itís fine and functions normally up and down.
1994 Trans am
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Old 02-28-2019, 07:51 PM
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Re: Passenger window down short ?

“Car Audio and Electronics” is not the best place for routine electrical issues. Let's move this to “General 67-02 F-Body Tech” where there’s more traffic.

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Old 03-01-2019, 09:48 PM
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Re: Passenger window down short ?

Can you explain what you mean by "it acts like a short"?
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Old 03-03-2019, 09:51 AM
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Re: Passenger window down short ?

Originally Posted by GaryDoug View Post
Can you explain what you mean by "it acts like a short"?
yes, when I use the switch on driver side to put passenger window down I can hear a click and the radio will cut out and the the battery voltmeter will drop. Iím thinking express down module or relay?
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Old 03-03-2019, 10:06 AM
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Re: Passenger window down short ?

The express down module/relay is only connected to the driver's window.

http://shbox.com/1/pwr_window_schematic.jpg
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Old 03-03-2019, 11:40 AM
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Re: Passenger window down short ?

Originally Posted by Injuneer View Post
The express down module/relay is only connected to the driver's window.

http://shbox.com/1/pwr_window_schematic.jpg
ah okay, I was just hoping it wouldnít be wire short but looks to be that way
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Old 03-03-2019, 12:28 PM
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Re: Passenger window down short ?

There is the possibility that someone has added an aftermarket express down module. There is also an aftermarket wiring kit that improves the wiring between the driver’s side controls and the passenger side window. Either of those could have gone bad, if installed.

Check against the wiring diagram. Note that the one I linked indicates 95 F-Body. That would indiate it is applicable to the Camaro and Firebird. However, the switch connector pinouts may be different. This (also from Shoebox) states it is a Camaro configuration, suggesting the Firebird connector may be different.

http://shbox.com/1/window_motor_switches.jpg

Best source of info for you would be the 1994 factory service manual, free download here (courtesy of GaryDoug):

https://www.mediafire.com/?40mfgeoe4ctti
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Old 03-03-2019, 09:01 PM
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Re: Passenger window down short ?

I would actually suspect the switch first. The switch has both 12v power and ground connected. All it would take to cause a short would be a broken actuator inside the switch. The direction of the window motor is controlled by reversing the polarity (12v <---> Ground). If one part of the switch is shorted to ground or 12v, one direction would operate normally but the other direction would cause a short.

Last edited by GaryDoug; 03-03-2019 at 09:06 PM.
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Old 03-04-2019, 06:17 PM
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Re: Passenger window down short ?

Originally Posted by GaryDoug View Post
I would actually suspect the switch first. The switch has both 12v power and ground connected. All it would take to cause a short would be a broken actuator inside the switch. The direction of the window motor is controlled by reversing the polarity (12v <---> Ground). If one part of the switch is shorted to ground or 12v, one direction would operate normally but the other direction would cause a short.
thanks guys for the help, Iíll get out there in the coming days to do some testing. Iím not sure itís the switch because I had this issue prior and bought brand new and it still existed. Iíve owned the car since 05 and trying to sort out some issues before selling .
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