hey, i have a 1987 z28 with a 305. when i bought the car, the guy said the battery still had half its life left. im only 15 so i cant drive yet, therefore it dosent get charged alot. it would sit in there for 3 days, then be dead. so i bought a new battery for it. same thing, it would die after a few days of sitting. so im thinking the alternator might be draining the battery. can some plz tell me what they think i should do. beacuse its really annoying having to disconnect the battery after evertime i start it and let it run. thanks. any help will be great!

 

Couple things - a car will still draw some power from the battery (clock, alarm/keyless entry, etc) even when it's off. It should last longer than three days though.

If you are storing the car, and don't plan on driving it, it's a good idea to disconnect the battery. Otherwise, find a trickle-charger and plug it in if you can.

If you can't, just be sure all the other stuff is off (lights, etc).

 

I had a similar problem with my car having a 12 volt draw on it 24/7. Leave it for a few days and it would die. Traced it down to the horn relay. Basically the horn was on 24/7 but the horn didn't blow so I didn't know it. I just knew the horn didn't work and it's toward the end of my list.

If you have a voltmeter you can check your fuse panel by pulling a fuse, checking for 12 volt drop. If it doesn't drop, move to the next one. An easy way to do this is to connect the positive amp meter to the positive battery terminal and then ground the ground to the body of the car. Don't ground it to the ground on the battery because you'll read 12 volts no matter what. If you have a voltage draw it should read how much voltage is being pulled. then all you have to do is pull each fuse until you find the circuit that's drawing the voltage. That should narrow you down to what circuits to hunt through.

Hope this helps.