Battery drain somewhere?

kfellers

Member
Mar 31, 2005
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Please help, my car obviousley has an electrical drain somewhere. How can I track it down. I've already removed the alarm, lighted visor mirrors, and stereo. How do I find it, Any help appreciated.
 
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Try disconnecting your horn.My son drives an old Town car horn went off by itself,he disconnected the horn didnt realize there was 2 and the batterykept draining.Does your horn work?If it doesn't try disconnecting it.(the second one didn't make any noise)
 
Typically it is something draining the battery. Small things like glove box or courtesy lights are often the culprits. If you have an aftermarket stereo or alarm system, it is also suspect.

The ideal method is to disconnect the positive terminal, and connect a Digital Multimeter (DVM) between the positive terminal on the battery and the positive cable. Set the DVM on a low current scale of 2-5 amps if it doesn't auto range. Watch the current draw, and then start pulling out fuses. When you see a sudden drop in the current, that circuit is the likely culprit. Note that the computer, radio & clock will draw less than 1/10 amp to keep the settings alive.

See http://assets.fluke.com/appnotes/automotive/beatbook.pdf. You will need the Adobe Acrobat viewer which is also a free download – http://www.adobe.com/products/acrobat/readstep2.html