Question about 2004 Dodge Caravan
That kind of problem is beginning to be all too common since manufacturers insist on using modules to control everything. Chances are that a control module is turning something on and killing the battery. Also, a seemingly good alternator can sometimes have a bad internal rectifier that can do pretty much the same thing. Tracking the problem down can be a long process.
You can begin by removing each fuse one at a time while having an ammeter connected between either of the battery main cables and the battery. If you find one fuse that causes the reading on the meter to drop substantially, that is the system causing the draw. (don't forget that having the door open while testing will also draw to operate the dome light.) Before testing, check the glove box light to make sure it's not staying on (applies to brake light and trunk or hood lamps as well).
After running through basic testing you come up empty, I suggest that you have a shop that specializes in electrical work look at it. Normal technicians, though expert at mechanical repairs, are often lost when it comes to electrical problems. Unless the shop you use has one person that specializes in that kind of work, chances are that you will spend much more money having them poke around than is actually necessary. (don't assume the dealer is any better at that. they aren't any different than anyone else)
Posted on Mar 27, 2011
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Posted on Jan 02, 2017
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