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make sure ALL lights are switching off when car is closed up for the night...also, new radio system? is the Amp staying on all night? also, an old test is to disconnect the negative battery cable and connect it back up...but use a test light to make the connection...in other words extend your negative cable with the test light and touch it to your negative terminal... if the test light bulb glow, it shows there is a draw on the system(have everything turned off while doing this) when the light comes on something is on and drawing power...start disconnecting fuses...when you disconnect the cicuit that is causing the draw, you'll be able to pinpoint the problem... also... ...everyone should have a manual for their vehicle(parts store or dealer), and a local library should have professional shop manuals available in the REFERENCE section for free...make copies of the appropriate sections...read up and good luck :) Dead short somewhere. Test by turning off everything (even dome light, clock etc) pull fuses if you have to. Disconect pos battery terminal. Put 12v test light between battery and battery cable. The brighter the light burn, the worse the short. Isolate circuit by pulling fuses one by one.

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โˆ™ 2006-07-11 20:56:10
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Q: What could be draining the battery on a 1992 Geo Prism you put in a new battery and a new alternator?
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