rawlinss 14 Report post Posted January 20, 2013 Another problem.... Battery not charging. Took off + post and car still runs. But, battery is still running down. Car has new 65 am alternator, belts all tight. any clue of what is wrong???? Quote Share this post Link to post Share on other sites
FrozenMonkey 12 Report post Posted January 20, 2013 Just a shot in the dark, maybe wait until someone with more experience chimes in...but maybe voltage regulator is bad? Quote Share this post Link to post Share on other sites
dsc2 10 Report post Posted January 20, 2013 Just a shot in the dark, maybe wait until someone with more experience chimes in...but maybe voltage regulator is bad? +1 Voltage regulator has gone bad. Quote Share this post Link to post Share on other sites
02Lightning 10 Report post Posted January 22, 2013 I would not remove the + on the battery while running. You can damage your alternator. Quote Share this post Link to post Share on other sites
danno 128 Report post Posted January 24, 2013 The regulators on the factory cars were very reliable, but yours could be bad. But the odds are it is not the regulator, it is a wire problem somewhere. Put a jumper cable between the chassis of the alternator and the minus terminal of the battery, and see if it charges then. Also take the wires off the battery and clean the terminals and wire connectors with a wire brush. They should be shiny when done. Also remove and clean the other ends of the battery wires. This is critical, and must be done before you proceed. Also, if you installed a new alternator, are you 100% sure it is connected correctly???? If connected wrong, it can still work in the manner you describe. So clean both ends of the battery terminals, Also, as previously mentioned, to not remove the + wire to the battery when the engine is running, this can fry things. If you did it and everything is alright, you might be lucky. Take the alternator in to any local car parts place and they can test it to see if it is still ok. Do you have a digital voltmeter? That is the place to start. What is the voltage when the car is running? Is is slowly going down? So clean both ends of the both battery cables with a wire brush. Take the alternator in to a shop for testing. Verify your alternator is connected correctly, and after all these are done, if it still does not work, buy a new regulator. But then.... regulators are cheap and easy. You can try it first. Quote Share this post Link to post Share on other sites
