Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

How to check bad wires?

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Old Sep 22, 2005 | 02:13 AM
  #1  
killer89ta's Avatar
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From: el paso
Car: 89 trans am
Engine: lB9w/ tbi
Transmission: t-56
Axle/Gears: 3.73
How to check bad wires?

my window won't roll up it just stopped...so how do i check wires? or is it simply a bad motor?
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Old Sep 22, 2005 | 02:54 AM
  #2  
BRobinson's Avatar
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From: Topeka, Kansas
Car: 82 Camaro
Engine: 305
Transmission: TH-350
Axle/Gears: 3.08
Check the fuse first. If that's good, does the motor make ANY sound at all? If not, pull the door panel off and use a multimeter to check each connector. If you've got power there, you can narrow it down to:
A)Bad motor
B)Bad switch
C)Dirty contactors in the switch

If it does make noise, the motor's bad, or (correct me if i'm wrong, which I may be) whatever mechanism that rolls the windows up and down may be stuck.

I discovered the hard way (with manual windows) that there was an old "For Sale" sign that had slid down in the door.

Last edited by BRobinson; Sep 22, 2005 at 02:57 AM.
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Old Sep 22, 2005 | 07:49 AM
  #3  
IROCNO2's Avatar
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From: Jacksonville, FL
Car: 1986 Iroc Z
Engine: 5.7
Get a multimeter and check each wire. You'll need a a schematic for your electric window system, probably available in a hanes manual. It will show you which wire should supply power, ground, and also if your wired up correctly. If you want to know if your switch is bad, read across it with it switched on, should read low resistance ( set meter to read resistance, ohms, should read (.OL) on meter face ) then switch it to off, should read (.OL). If it doensn't change from .OL the entire time you have a bad switch. Also, be sure the wires are disconnected from the switch while you read it, it will give you screwed up resistance readings if you don't. You would more than likely have to contact the window motor manufacturar to get the schematic for the internals on it, probably to much of a PITA, I dont think motors are super expensive anyway. Good luck.
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Old Sep 22, 2005 | 03:01 PM
  #4  
PhLaXuS's Avatar
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Joined: Feb 2005
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From: Fort Lauderdale, FL
Car: 91 Camaro RS
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 2.73 Posi w/Disc
Here's a thread on wiring in a power window module from DEI. It has a schematic of the power windows:

https://www.thirdgen.org/techbb2/sho...hreadid=321721
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Old Sep 22, 2005 | 04:17 PM
  #5  
killer89ta's Avatar
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Joined: Apr 2005
Posts: 27
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From: el paso
Car: 89 trans am
Engine: lB9w/ tbi
Transmission: t-56
Axle/Gears: 3.73
ok thanks alot will do....and just so you guys know the motor doesn't make any noise and it worked fine till it just stopped didn't show any signs of going bad either.
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