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Alternator? Loose belt? Voltage regulator?

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    #1

    Alternator? Loose belt? Voltage regulator?

    Battery light comes on if i use the ac periodically or during low rpms under 2.5k... if i rev the car past 4.5k the light will turn off for a bit then eventually turn back on. This all started today, the day after i rinsed the engine down using purple power and a water hose. Could i have messed up the alternator? It was just recently installed in april
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    #2
    Go to a parts store and get your charging system checked.

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      #3
      I have a multi meter. What tests would they run?

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        #4
        If you think it's the alternator, turn everything in like the AC, lights, wipers, etc. Check for 13.8+ volts under load. Charged battery should be 12.6v.

        Also test how much AC voltage the rectifier is letting through. A small amount is fine, but anything over like .05v might cause problems.

        Make sure your terminals and grounds are clean.

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          #5
          Ended up checking the alternator like u said and it could barely keep a charge above 11.4 volts, took it to autozone and they said the voltage regulator internally was defective

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            #6
            easiest route is to just replace the whole unit. Have them check it before you walk out with it. Remanufactured shit from AutoZone is bad 7/10 times.

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              #7
              Got it all sorted. Somehow the bolt that keeps the tension came undone or whoever installed it didnt put it back on so got a new bolt and tightened everything back up. No problems so far. Just gotta throw a new belt on now. Noticed the belt had rips in the ribs when reinstalling it

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                #8
                Go for a new belt and don't buy a remanufactured alternator from AutoZone get a brand new Bosch from Amazon and you won't have any problems. BTW go with a bando belt never had any problems with them daayco and all that other shit constant squeals and bullshit lol.
                Last edited by Kev1990; 07-28-2016, 06:23 AM.

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