Please Help! Only car I have!

Ok so my sunfire died while i was listening to the radio. So i figure i was listening to it to long and killed the battery. I jump started the battery left it on for 10 mins and my friend turned the heater on and it died. So we jump started it again and it was fine got about maybe 5 blocks and everything went off. No lights, nothing. We check the alternator its fine. Still the battery? Dunno please help.
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Sounds like the alternator to me, id have it checked again. Might not hurt to check your battery cables and terminals to make sure there is a good connection 1st. Does it lose power after you jump it (voltage gadge slowly drops, lights get dimmer and dimmer, acceleration power decreases) or does it just suddenly die out of the blue?

After you jump start it, disconnect one of the battery cables from the battery right away, if dies immediately, your alternator is junk. If not, your alternator can still be bad, but that's the easiest way to check without a volt meter.

I had that type of proplem before, no a sunfire though.. Before i had owned the car, the must have replaced the starter, and reconnected the wires with the yellow/blue/or red double ended wire connectors. One of them was almost out of the connecter completely, but had like 3 or four threads holding on. So some days it would start, die, start again, die randomly, till i looked under the car and saw the power wire going to the starter.. Worked like a charm, and never had a problem again..

After you jump start it, disconnect one of the battery cables from the battery right away, if dies immediately, your alternator is junk. If not, your alternator can still be bad, but that's the easiest way to check without a volt meter.


never never never never do this on newer cars, if your alternator is good, you will blow up your alternator or more so the regulator in the alternator. or worse your coil packs, to much power is being drawn from the alternator and no batt present to back the system up, DONT attempt this. in any way or for any amount of time. take it to have it tested.

to the op, is this a factory system, or aftermarket, bass? when you boosted the car or boost it, turn everything off on both cars, GM's alternators SUCK at boosting other cars and have learned it will burn up the alternator of the good car.

if you have a system other then factory, make sure all your connections to from batt, starter, and system are good. take the car to another place to have charging components rechecked. i had a friend with a 99 s10 did the same thing, bought new batt truck was doing same thing, took it to three different shops before it showed the alternater was bad. and your symtoms show a bad alternator, as everything is electric, needing x amount of juice to run ie injectors, fuel pump, once batt has fallen below x amps no more juice to run injectors, etc.


if you ever kill the batt again, and boost, dont start the car, more so if the charging car is GM, let the dead batt charge remove jumper cables then try to start dead car with everything off, if no start repeat but dont attempt to start with cables on

Check your battery with a load tester or hygrometer. Possibly the battery is done.