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Old 12-08-2014, 09:19 AM   #1 (permalink)
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Default Battery light flickering intermittently

Just a couple days ago I noticed that my battery light flickers ocassionally. I havent noticed the lights dim or anything. I check the battery voltage at idle with all the accesories on and I got 14.34 volts. The battery connections are tight. Im not sure how much deflection the alternator belt should have, but it doesnt seem super loose. I could tighten it a little. What else could I check?
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Old 12-08-2014, 09:26 AM   #2 (permalink)
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You may have a short in the wiring to the dash. Check for breaks or corroded connectors.
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Old 12-08-2014, 11:11 AM   #3 (permalink)
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I just had an idea. Maybe I could datalog the battery voltage in Neptune and see if voltage drops at all.
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Old 12-08-2014, 11:49 AM   #4 (permalink)
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Is your battery tie down tightened? If not the battery bounces/shifts around and will cause this
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Old 12-08-2014, 11:57 AM   #5 (permalink)
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Quote:
Originally Posted by DontGrabMeThere View Post
Is your battery tie down tightened? If not the battery bounces/shifts around and will cause this
Yeah its tied down fine. The battery is about 4 years old
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Old 12-08-2014, 12:27 PM   #6 (permalink)
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Are the connectors on the terminals nice and tight too?
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Old 12-08-2014, 12:50 PM   #7 (permalink)
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needs one alternator or belt tightened. Volts won't matter if the amps aren't there
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Old 12-08-2014, 06:05 PM   #8 (permalink)
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4 years huh. Time to get it checked
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Old 12-08-2014, 07:34 PM   #9 (permalink)
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Oddly the "Battery" light has nothing to do with the battery, it is a circuit in the alternator. Alternator needs load tested (with amp reading)
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Old 12-09-2014, 03:53 AM   #10 (permalink)
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So in order to load test I would have to take it off the car right? I have a spare alternator from my other motor so I might just throw that one on.
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Old 12-09-2014, 07:42 AM   #11 (permalink)
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Do that and report back
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Old 12-09-2014, 10:30 AM   #12 (permalink)
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Doesn't have to come off the car, just needs tested with a load.
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Old 12-09-2014, 12:17 PM   #13 (permalink)
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Awhile back I had forgot to put the oil cap back on when I added oil. The alternator did get a nice oil bath. Maybe Ill try cleaning the connector on the back.
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Old 12-09-2014, 12:49 PM   #14 (permalink)
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Well I think I may have found the problem. The bolt that holds the alternator mounting bracket was completely loose. I was able to move the alternator back quite a bit with a pry bar. I tightened it all up. Hopefully that solves it.
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Old 12-10-2014, 06:46 PM   #15 (permalink)
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If the belt is slipping the ya I could see that being an issue.
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Old 12-10-2014, 07:22 PM   #16 (permalink)
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Well the battery light is still coming on. Im just gonna swap out the alternator in the morning.
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Old 12-11-2014, 07:27 AM   #17 (permalink)
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I swapped out the alternator this morning. What a PITA. Took me about an hour and a half and its 30 degrees and windy outside. Anyways so far so good. Ill drive it for a couple days and see if the light comes back on.
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Old 12-11-2014, 10:42 AM   #18 (permalink)
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Sounds like you might have nipped it.
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