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i would check the charging system, first make sure the battery is taking a charge while running should read about 14+ volts if not you have a draw usally caused by an after market part such as radio or speakers also make sure that nothin is left in the cig lighter such as a charger. even a charge can kill some batterys depending on how much draw its taking
Maybe it wasn't running long enough to charge up the battery? Stop trying to jump it, when you are having problems with it dying, take the battery off and have it charged. And/or buy a $20 voltmeter to see what the battery shows. If it says less than 12 volts, it is discharged, and needs charging. A good battery that is not run down should have at least 12.5 volts. A new battery that is charged should have very close to 13 volts, maybe 12.8 volts. When you have the truck running, check the alternator for charging. You put the voltmeter right on the battery and check it again. This time, with truck running, battery should show at least 13.5 volts. That shows the alternator is working. A good alternator will put out about 13 or 14 volts-the regulator will keep it from going any higher to prevent problems, like a melting battery or electrical parts burning out. I would say get the charging system working right, then address the problem of dying at stop lights. That could be a carburetor problem, if the alternator is working.
renew the alternator ,its a bosch unit as original and the diode rectifier pack has a faulty diode ,change and get a bosch replacement unit and not a made in china cheapo their just juk and not worth the effort
First, you can't and shouldn't test an alternator by disconnecting the battery cable while the engine is running. You run the risk of cooking the alternator and the computer. Thats how we used to test generators back in the last century. Is the check engine light on when the engine is running ? Is the battery charge warning light on ? There should be a fuseable link between the alternator and the battery that could keep the alternator from charging the battery. The ignition module would have no effect on the charging system.
are you saying that you got this battery from autozone? I went thru three batteries in a week from autozone because the lot# was bad. It,'s quite possible that you have either a short that is draining the battery or that the alternator isnt charging properly. To do a fast check, start the car then remove the positive battery cable with the car running. If it stays running, theres a chance its ok. If it dies, It's most likely the alternator or the voltage regulator Diods. On most cars, the voltage regulator is built into the alternator. I would take it to autozone and have the charging system checked
Double check all connections are clean & tight. You need to get a voltmeter and have the voltage tested at battery with engine off & running. Drive it to the Napa shop you bought the alternator from if necessary, they should perform test free of charge, as the possibility of a faulty one is not out of the question, provided all is connected properly. Did you check that a main fuse for alternator wasn't blown in Uunderhood power distribution box?