Battery Light
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4th Gear
Joined: Nov 2017
Posts: 4
Likes: 0
Battery Light
Lately my battery light lights up while driving. It doesn’t stay on long and doesn’t come on every time. Usually on long trips hour or more. Or when lights and radio is on. I haven’t had any problems starting the truck. Is the alternator going out. I looked for loose wires and there aren’t any.
thank you.
i forgot to add. 2008 F 250 extended cab 4X4. And I don’t use the AC because it causes the Check Engine Light with intermittent miss fire. A mechanic checked and couldn’t find the problem. He reflashed computer and it was ok for a week. Then started again. (The Ac/interment misfire)
thanks again for your help.
thank you.
i forgot to add. 2008 F 250 extended cab 4X4. And I don’t use the AC because it causes the Check Engine Light with intermittent miss fire. A mechanic checked and couldn’t find the problem. He reflashed computer and it was ok for a week. Then started again. (The Ac/interment misfire)
thanks again for your help.
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Welcome to the site.....How many miles on the alt? 100k pull it off and check the brush set...Bearings for noise etc...Or as most folks do get a new unit..
I just rebuild mine... Easy for me....The light means its not charging usually....Brushes hang up or are worn... Voltage at battery when running 14.5v
I just rebuild mine... Easy for me....The light means its not charging usually....Brushes hang up or are worn... Voltage at battery when running 14.5v
Postmaster
Joined: Nov 2015
Posts: 4,807
Likes: 125
From: Colorado Springs
Disconnect the batteries and test each one individually, what voltage are you seeing? Now test the alternator on the truck, everything off in the cab then everything on are you seeing 14+ volts at the alternator? What are you seeing at the batteries?
Take the batteries and the alternator to get them load tested... determine what the problem is before you start throwing money at it.
Take the batteries and the alternator to get them load tested... determine what the problem is before you start throwing money at it.
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