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Re: dead battery Posted by IrieTom [Email] ![]() ![]() ![]() In Reply to: Re: dead battery, Lisa, Wed, 28 Feb 2001 10:45:21 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Find someone who knows how to use a multimeter (assuming you don't have one yourself- I don't want to sound condescending) and drive the car around for a long enough period of time to charge the battery (maybe a half-hour of highway driving.) Check the voltage of the battery without the engine running. You should see around 12V across the battery terminals. Then start the car and rev the engine a little. The voltage should jump to 14.5V or so at the battery. If it doesn't, then you have a charging problem, and your alternator, alternator grounding points, and voltage regulator should be checked.
If the battery voltage checks out OK, then it's getting drained while the car is parked. Hook up an ammeter (or DC current function of a multimeter) in series with your battery and see what happens to the flow of electricity as you unplug fuses one by one. This will help you determine where the drain is occurring. See if you can increase the current by opening your trunk- if you can see a larger current with the trunk open and a decrease when you close it, then you have eliminated the trunk light as the culprit.
This can be a little intimidating and frustrating at first, but go ahead and give it a shot. Keep asking questions here, and you'll eventually solve the problem and learn a little electrical theory as well.
Good luck-
Tom S.
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