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Dead Parrot · 04-17-2018, 06:42 AM

Check voltage with the engine running on fast idle. Should be around 14v. Then turn on some lights and see if voltage stays steady. Could be the alternator has partially failed.

Is the alternator OEM or an aftermarket "one wire" version? One wire versions get their voltage sense at the alternator instead of the junction block. Can make a difference if there is a voltage drop in the red charge wire from the main alt terminal to the junction block.

Could also be a warranty event on the battery.

04-17-2018, 06:42 AM	#7
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,485	Re: Battery wears down Check voltage with the engine running on fast idle. Should be around 14v. Then turn on some lights and see if voltage stays steady. Could be the alternator has partially failed. Is the alternator OEM or an aftermarket "one wire" version? One wire versions get their voltage sense at the alternator instead of the junction block. Can make a difference if there is a voltage drop in the red charge wire from the main alt terminal to the junction block. Could also be a warranty event on the battery.