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Clean the battery cables & posts. Charge the battery if you have a charger & test with a volt meter. See if she starts.
[/b]A new fully charged battery will test at about 12.76 volts usually (at rest).
Imo, you probably need a new battery or alternator.
This ^^^ ....acting like the battery is toast...just old and has died...but if, as you said, you have lots of corrosion, the terminals could be corroded inside the attachment points. Try cleaning them first, but most likely your battery has just died of old age.
Might have wrecked the alternator. I had a Grand Am which the alternator had a fuse give out and it drained the battery...$135 to replace it...All was fine afterward...
Speaking of terminal corrosion, most people never service their battery. I went to a seminar at Exide once, and they recommended removing the battery, scrubbing down the exterior of the battery and the battery tray with a brush, a little bicarb and a lot of water, cleaning the terminals and terminal connectors and applying a little anti-oxidant to the terminals before reinstalling the battery. I have to admit I'm sort of lazy about it, but I always use the anti-oxidant on the terminals when I install a new battery, and once a year or so I spritz it with Simple Green, brush all the crud off and hose it thoroughly. If there's any sign of electrolyte spillage I pull the battery and clean the tray.
Maybe I got lucky. I bought a new battery and truck started up. Drove around the neighborhood a couple times the alternator was charging and no lights or any other problems.
A test light or a volt meter might give you some idea of the battery condition. However to really know the condition of your battery it has to be tested under a load. Most parts stores will test it for free using something that is designed to test the battery under a load.
Speaking of terminal corrosion, most people never service their battery. I went to a seminar at Exide once, and they recommended removing the battery, scrubbing down the exterior of the battery and the battery tray with a brush, a little bicarb and a lot of water, cleaning the terminals and terminal connectors and applying a little anti-oxidant to the terminals before reinstalling the battery. I have to admit I'm sort of lazy about it, but I always use the anti-oxidant on the terminals when I install a new battery, and once a year or so I spritz it with Simple Green, brush all the crud off and hose it thoroughly. If there's any sign of electrolyte spillage I pull the battery and clean the tray.
I clean my battery once every 18 - 20 years. I do not want that dirty thing in my car when I take it in to avoid a core charge when replacing it. However now, with the autoparts stores installing them for free, there is no longer any need to clean them. I have not seen a terminal get crudded up in years, probably more than a decade. Most batteries now have covers on the terminals, that might be why.
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