The drivers side power window on my 1972 coupe has quit working. The pass. side still functions. I have checked, and am getting power to the switch, but am getting no power to the motor. I direct wired to the motor and it worked fine. Can anyone tell me if the wires from the switch to the motor go to a fuse or block anywhere between the two? My diagram does not show anything, and it seems strange that both wires would break at the same time. Any help would be appreciated. Thanks, Tom
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Re: 72 power windows
Tom------
I'd suspect a defective wire. The most likely culprit is going to be the wire as it passes from the forward door jamb area to the door, itself. This area of the wire gets "worked" a lot and the wire, although of the stranded variety, is subject to work-hardening and breakage. The breakage will likley be internal to the insulation so it might not be easily apparent.In Appreciation of John Hinckley -
Re: 72 power windows
Joe, I was hoping that there might be something else. Replacing that wire looks to be pretty tedious work, but your are probably right. I thought it strange that both up and down wires would break at the same time, but it is definatley between the two terminals at motor and switch. Thanks again for the response. TomComment
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Re: 72 power windows
Seems funny to me that 'suddenly' both PW switches and/or both LH/RH wiring harness assy's fail simultaneously....
Your copy of the AIM (Assy Instruction Manual) will show you A31 (PW Window) takes its power from the fuse box AUX terminal (unfused) and has its own built-in electrical overload protection in the form of a circuit breaker attached to the engine compartment firewall. Circuit breakers only fire when current flows, so this could well explain why you have 'power' (read that voltage, specifically) to the PW switches but the window motors fail to operate when switches are actuated (circuit is completed to ground and current flows, or tries to flow dissipating power from the energy supply source).Comment
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what if the window goes real slow?
My window on the drivers side goes up and down real slow. The other window works just fine. If I rev the car, the window goes up almost as well as the pass side. Is this an indication that the window motor is starting to fail? Any thoughts?
ChasmanComment
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Re: what if the window goes real slow?
Maybe, but more likely the window guides are worn (driver's side gets much more use than passenger side) and the window is binding in the tracks. Also it is possible that the lubricant has deteriorated and hardened, but that is less likely. Both sides should exhibit the same lubricant deterioration.TerryComment
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Re: 72 power windows
I found the problem on my power window. After two days of searching, I began to pull the wire out of the door. The two wires are wrapped with tape, and head up behind the speedometer after coming through the door. I was pulling from under the dash when the wire parted completly. Both up and down wires to the motor had broken, but due to the insulation and the wrapping still holding, the break was not visible. This break had occured just inside the dash side of the door well. Apparently thirty years of flexing had finally fatigued the wires. This would be a good spot to check, if one or the other of your windows fails.Comment
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