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Don 'Mo Lurch'
Don 'Mo Lurch', Auto Mech / Electronics
Category: Chevy
Satisfied Customers: 20666
Experience:  Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
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I have a 2001 Chevy Suburban, 4x4 2500. I need help

Customer Question

I have a 2001 Chevy Suburban, 4x4 2500. I need help diagnosing an electrical problem having to do with the windows, and help w/ a solution on how to fix it.
Submitted: 5 months ago.
Category: Chevy
Expert:  Don 'Mo Lurch' replied 5 months ago.

what is the issue?
is this with ALL Power Windows, or just Driver or Passenger Front?

Customer: replied 5 months ago.
Thanks for getting back w/ me Don. The Driver front and Driver rear stopped working at the same time a few months ago. They do not work with the front or rear switches. The passenger windows work fine from the driver's switch though and from their own switches.So far, I have found the switch wiring diagrams online (http://www.autozone.com/repairguides/Escalade-Suburban-Tahoe-Yukon-Denali-DenaliXL-YukonXL-1999-2005/Windows-2001/Power-Window-Schematics-4-Door/_/P-0996b43f803709ae) and checked the power at the switch with the switch unplugged from the connector. I am getting 12v power at the window up and window down wires on both of the passenger windows, but both driver windows I'm not getting any voltage.
Expert:  Don 'Mo Lurch' replied 5 months ago.

The Circuit on the Power Windows ia "Reversal Rest At Ground-", meaning:
There are "two wires" at each Power Window Motor
With Switch in DOWN position
One wire will have DC Voltage +
One wire will have Ground -
With Switch moved to UP position
The wire that had DC Voltage + is now Ground -
The wire that had Ground - is now DC Voltage +

See if this helps:

Use of a VOM is needed to test
The way it works:
Ignition On
Switch held in Up position
One wire will have 12 Volts +
One wire will have Ground -

Switch held in Down position
The wire that had 12 Volts + is now Ground -
The wire that was Ground - is now 12 Volts +

If Voltage or Ground checks good at motor, replace motor.
If Voltage or Ground does not check good:
Check Switch Voltage & Ground.
Check for broken wires at Door / Kick Panel Boot

.
IF you need Schematics, let me know

Customer: replied 5 months ago.
Actually, I got it figured out on my own but thanks! It ended up being the 25A fuse in the fuse panel at the end of the dash.
Expert:  Don 'Mo Lurch' replied 5 months ago.

that was a "plus"........glad you got it
If there is an issue for the blown fuse, let me know
thank You
Thanks for using J/A