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baffled by power drain

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Old Jan 15, 2011 | 03:28 PM
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baffled by power drain

I'm completely baffled..batteries keep draining so I unhooked neg batt cables and hooked a test light up to try and find out what is drawing them down. Here comes the weird part, when I hooked up the test light, it comes on and then slowly fades after 5-10 seconds, I don't even have time to pull any fuses. Then it won't come back on until I disconnect it and hook it back up. what the $%^^*@ is going on?
 
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Old Jan 15, 2011 | 03:51 PM
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This may be completely off base, and I'm not really good with electronics, but that almost sounds to me like a capacitor charging up. Once its charged, it won't draw power, so the light fades outs as the capacitor charges.

Don't think that will really help you, but its a random guess...
 
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Old Jan 15, 2011 | 03:57 PM
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duh, whats a capacitor look like george?which way do I go huh which way
 
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Old Jan 15, 2011 | 04:51 PM
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You might have a dead short somewhere, also how old are your battieres?
 
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Old Jan 15, 2011 | 07:44 PM
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batteries are only 1 yr old
 
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Old Jan 16, 2011 | 08:37 AM
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still need help on this one, can't figure out how to test if light won't stay on and I really don't know what a capacitor looks like. Think I'm going to pull batteries and get them tested, what else should I do?
 
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Old Jan 16, 2011 | 08:46 AM
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go to google then google images then type in capacitor they come in all diffrent shapes sizes and colors.
 
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Old Jan 16, 2011 | 10:08 AM
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found the fuse it's on, just don't know which circuit it is. It is #20 in the big box on drivers side under hood, had a 50A fuse in it. anybody out there can help a brother with no manual out?
 
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Old Jan 16, 2011 | 10:13 AM
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did a search and found diagram, thanks powerstroker 100
 
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Old Jan 16, 2011 | 11:14 AM
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OK, I've narrowed it down to 2 circuits-1 runs the courtesy/dome/cargo lights, electric mirrors, radio/clock memory/speedometer memory and the warning buzzer/chime module. The other runs ; stop/hazard lamps,stop sense for anti-lock brakes, electronic engine control and speed control. looks like I have about 400 miles of wire to run down b4 I have to go to work YAY
 
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