Battery Charging Question... Real quick!
03-18-2011, 11:49 PM
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Car: 88 Formula 350
Engine: 5.7
Transmission: T-56
Axle/Gears: 9" 3.89
Battery Charging Question... Real quick!
I was driving and the gauge said around 12ish volts, then I noticed my lights got brighter and the gauge bounced around 14 volts, and would kinda dip down and up a bit, then eventually go back to around 12.
The Gauge usually reads a steady 12 volts.
Is this a sign that my alternator is going out? Or is it a bad ground?
The Gauge usually reads a steady 12 volts.
Is this a sign that my alternator is going out? Or is it a bad ground?
03-19-2011, 02:40 AM
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Re: Battery Charging Question... Real quick!
The probelm you describe is typical of worn alternator brushes. May also be a failing regulator. However, before i go buy a replacement, I would check the Battery cables and connections, and all wiring and connections to the alternator. Note: the alternator grounds through its frame to the engine. The wires to the unit are all power, they should each illuminate a test light with the key on, engine off.
03-19-2011, 09:02 AM
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Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: Battery Charging Question... Real quick!
Mine did that, lights flickered a bit and gauge moved some - alternator was overcharging. Any auto parts store can test alternator in the car for free (AZ/Advance/Oreilly/etc.) - go have it tested.
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