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Electrical issue..

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Old May 24, 2006 | 10:47 AM
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From: Crandall,Texas
Electrical issue..

..i think.

Hope I posted this in the right section.


My power mirrors, power door locks, rear hatch release, interior light/s, horn,cig lighter all quick working at the same time.
I checked the fuses, all good. These seem to run together somehow.
My power windows work fine. Only the things mentioned above dont.
What else could be the prob? Is there a fuseable link/ If so, where is it?
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Old May 24, 2006 | 11:01 AM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Is there a fuseable link/ If so, where is it?
Yes. At the starter.

However, every one of those things is on the same fuse: the interior light one. In fact, I think you left one thing off, that also shouldn't be working; that would be the radio clock & memory, which gets its feed from the same circuit. I suggest that rather than "checking" that fuse, you replace it. I seriously doubt that the problem is anything besides that fuse, with the possible exception of a damaged wire very near the fuse box.
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Old May 30, 2006 | 07:14 AM
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From: Crandall,Texas
Any idea what that fuseable link looks like? I could barely get under the car to see what was there. I had to feel mostly but did see what looked like a black thicker connection in the wiring?
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Old May 30, 2006 | 07:57 AM
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The fusible links are merely the first 10" or so of the big red wires that feed power to everything in the car, where they connect to the battery cable post at the starter. They have a molded splice thing where they connect to the big red wire itself. All they are, is a piece of wire that melts, like a fuse; they're there to protect the main power wiring.

I doubt it's one of those. I'd bet money it's the "Courtesy Lamp" fuse. Just change it out.... especially if your radio's clock & station preset memory is also not working. Each fusible link feeds ALOT of stuff, so to have that few things not working, and all of them on the one fuse, sounds suspiciously like the fuse.

Pluralitas non est ponenda sine necessitate!!
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Old May 30, 2006 | 08:02 AM
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Ahh, if fuses could talk....

If the links appear intact, and a new fuse doesn't solve it, there is a remote possibility that the bussing in the fuse panel is failing. There are some crimped connectors there, and after some age, use, vibration, and heating, they can fail. If you're lucky, a new fuse will solve it. If not, you'll need to get an actual voltmeter out and start troubleshooting.
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Old May 30, 2006 | 09:47 AM
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From: Crandall,Texas
Not sure what the 'courtesy lamp fuse" is. So your saying its one of those colored fuses, the ones that you can see through to see if it's bad? Or one of those square shaped metal type ones?
I did however, checked all, just to be sure, the "color" fuses in the fuse panel and they all looked ok.
BTW: The radio clock is working fine and keeping time.
Whats out is rear hatch release,all int. lights, horn, power mirrors,power locks, rear view mirror lights.

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Old May 30, 2006 | 10:00 AM
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The "Courtesy Lamp" fuse is the one labelled "Courtesy Lamp". Might be abbreviated "Ctsy Lp" or some such on the fuse box. IIRC it's a 30 amp fuse (green) but I could be wrong.

Don't bother with "looks good"; REPLACE IT.

The power door locks work off of a relay. There's a high-current power source that feeds the contacts that actually drive the solenoid; but the relay coil, which is driven by the pushbutton, is fed off of the "courtesy lamp" circuit. The hatch release and the horn circuits work the same way: the actual devices have high-power feeds of various sorts, but the pushbutton is fed off that dome light circuit.

Google the Latin expression up there. Understand and memorize it (in a language you DO understand, if you don't happen to understand Latin...). It's a great thing to remember for troubleshooting. It translates literally as "entities are not to be multiplied without necessity". In its original context, it means "don't add unnecessary stuff to explain something that can be explained without it". Or as we would paraphrase it for the purpose at hand, "the simplest explanation that fits all the facts tends to be the right one". Or even, "keep it simple, stupid".

Last edited by sofakingdom; May 30, 2006 at 10:07 AM.
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Old May 30, 2006 | 10:18 AM
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Good point.

It can also be maintained that if you eliminate the impossible, whatever remains, however improbable, must be the cause.

Ok, I'll replace that fuse. Then narrow it down from there, if possible.
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