99 Olds cutlass
Battery Light On, I have changed the alternator, tested the battery all are good. I also had the old alternator checked and it was good.
After testing the car with a full load the discivered that the alternator is not charging. The battery went dead after about ten minutes of use.
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Sounds like battery terminal corrosion. Try cleaning the terminals and cable ends with baking soda and water and an old toothbrush, then add some dielectric grease and put the cables back on. If that doesn't help- check for bad battery cables: https://getjerry.com/questions/how-do-i-test-if-my-battery-cables-are-bad
If that all checks out, then your N.E.W (Never Ever Works) starter is very likely defective. Your alternator looks good and 12.6 volts on a new battery is just fine.
Well the charge light means the alternator is not charging the battery. You would need to get the alternator and circuits tested on the car. It could be a bad connection somewhere or other wiring problem.
Do you mean the battery is draining overnight, and needs jump started? On your Olds, if this is the case...the starter has to be draining the battery...most likely a short...is it the original starter? Changing the starter on your Olds is not a big deal...:) Nice Car, if your Cutlass has gauges...(including Volts/Battery) the signal should show...toward charge when driving...The starter short is hard to confirm.
check with a volt meter if u have 12 volt at the big lead on the back of the alternator engine off
if thats good start engine check to see if alternator is charging check the battery a good alterntor charges 13.5 - 14 volts, u may have a bunk alternator
It means that your charging system is in trouble. Possiblity is alternator...or the battery. Go to Schuck's/Kragen/Chief's/NAPA....they will test BOTH for free.
Are the battery cables corroded or otherwise no making a good connection? Clean them with a cable end cleaning tool avail at any auto parts store for around $5.00 and try it again, I bet the that is the issue, also charge the battery and have it tested at Kragen, they do it for free.
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