I am having a frustrating time with my Galant. The battery simply will not hold a charge. Jump started it last night at my friends house and he ran a voltmeter across the battery and it showed just over 14 volts, so presuming that the alternator is fine. When I switch off the engine however the power just drains out of the battery, and if I try to start it 30 secs after switching it off then it just clicks. My friend (who is a bit more knowledgable than I) was guessing that either it is a bad diode somewhere or something is shorting out and causing the battery to drain almost instantly. Do either of these sound plausible and if so, how can I check to narrow down the problem? Any other thoughts as to what the culprit might be?
First you need to make sure the battery is good. If so you need to check for a short. You need an amp meter. Remove neg cable put one lead on cable and other on neg side of battery. Should not have more.0050 of amp if over 1/2 amp is too much. Pull fuses one at a time to untill 1/2 amp and lower. That part of curicut is the problem. Then need to trace out the problem.