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Old 07-16-2005, 10:19 PM
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Electrical Troubleshooting Crash Course?

Could someone please give me a crash course in indentifying and troubleshooting electrical problems? I have a good quality voltmeter, but don't know how to use it for finding/tracing/identifying electrical problems.

Case in point: I am currently trying to fix some problems on my fiance's '74 Jaguar XJ6 w/Chevy 350. The power windows work sporadically, sometimes not at all. For example, all windows were working this afternoon (some better than others) but this evening, the DS rear will not move and is stuck halfway up. I removed the DS front switch, which I know is good since it worked seconds before, and hooked it up in place of the DS rear switch. Window still won't move. So, if it isn't the switch, then I figure it must be the wiring somewhere. But since that window was working earlier in the day, it makes the situation seem more mysterious to me.

Any help is appreciated.

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Old 07-16-2005, 10:26 PM
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I think the problem is in the motors. The gear lube gets dried out and then become hard to move. You need to get the panels off and spray the motors and the drive gears with some "Tri-Flow" spray. It is kind of pricey but it the best I have found.

Good Luck
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Old 07-16-2005, 10:28 PM
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check the wiring in the door jamb. the wires in the drivers side door jamb have a tendency to break over time from opening and shutting the door. one broke wire will kill a motor because a window motor work up and down with reversed polarity (swapping power and ground ).hold up on the switch and have someone smack the door motors can become stuck if not used alot aka the rear windows.
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