Charging Light Flickering
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Charging Light Flickering
Hope some one can Help. On my 250 super duty the light on the dash keeps flickering, so I replaced the alternator thinking that the voltage regulator was going bad. That did not work can some one please give me some direction on what to look at next.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
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From: Middle Tennessee
Originally Posted by walkerl
Hope some one can Help. On my 250 super duty the light on the dash keeps flickering, so I replaced the alternator thinking that the voltage regulator was going bad. That did not work can some one please give me some direction on what to look at next.fficeffice" /><o>></o>>
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From: NE Ft Collins, Colorado
Are you talking about the red battery light on the dash? Mine was going off and had the alternator tested and it was bad. Put a brand spankin new one on from Auto Zone (gold series or whatever...the one that is all brand new and not reman)
The battery light was still flashing after a couple of days....took the alternator back and had them test it and the new one was bad. All they had was the reman so I got the difference back.
Take the truck to auto zone and have them do a test, its free. These alternators have to pull 12 volts or otherwise that light will come on.
The battery light was still flashing after a couple of days....took the alternator back and had them test it and the new one was bad. All they had was the reman so I got the difference back.
Take the truck to auto zone and have them do a test, its free. These alternators have to pull 12 volts or otherwise that light will come on.
Lead Driver
Joined: Dec 2003
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Mine just did that saturday night. I have an "oh-rye-lees" alternator in it and I just figured I was going to need another so I ordered a motorcraft. Funny thing though, when I checked output it was at 14.5v and I have not been able to make the light flicker again.
This all happened after jumping a friends car. I gues the alt couldnt handle 3 bats.
This all happened after jumping a friends car. I gues the alt couldnt handle 3 bats.
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Joined: Aug 2004
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From: Yacolt, Washington
Had a similar problem, new alternator and batteries but light still going on and off mostly on. One of the wires in the harness to the alternator had the insulation rubbed off in a hard to see spot and was grounding out.
Lead Driver
Joined: Dec 2003
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Well, I still have not seen my light flicker again since saturday. I am just gonna wait to see what happens since I got such a good reading with the dmm.
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Postmaster
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My original went bad, got a new high-dollar one from Advanced Auto, light started flickering a few days later, they tested it, tested good, I insisted on a new one, hasn't flickered since, now I don't trust their tester.......
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From: Yacolt, Washington
Originally Posted by walkerl
Can you tell me where abouts that wire is that was rubbed off. Also can a bad battery cause this problem
Any auto electric or battery shop should be able to determine if you have a bad battery, alternator or this type of wiring problem at little or no cost, the cost is locating the problem wire.
Lead Driver
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Just an update on mine, my battery light had not flickered in over a week. The other night it started flickering again and the lights would dim pretty low every time it would do it. I put the new alternator in the next morning and it has worked like a champ. Funny how the one I took out still tested good on the bench. I think it was flaking out after it would heat up.
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I am having the same problem with a 2001 F-350 V-10. All the lights flicker while the truck is running - dash, dome, clearance, head, tail, etc... Even the voltage gauge on the dash bounces to the same beat. Almost like there is a pulse in the lighting circuit. It's very consistent...not like a short or bad conection.
The truck has a new alternator and Battery. Both have been swapped for testing purposes and nothing changed. Although when you unhook the battery while the trucks running, the flickering stops. This is very interesting....but only puzzled me more, because 2 alternators tested good....but didn't fix it!
I'm wondering if I should try an alternator from a different company?
Is the Ford (motorcraft) one recommended??
Or is it the just the difference between New and Reman that is important?
Also, does anyone know what the minimum voltage is needed for this truck to function properly?
The truck has a new alternator and Battery. Both have been swapped for testing purposes and nothing changed. Although when you unhook the battery while the trucks running, the flickering stops. This is very interesting....but only puzzled me more, because 2 alternators tested good....but didn't fix it!
I'm wondering if I should try an alternator from a different company?
Is the Ford (motorcraft) one recommended??
Or is it the just the difference between New and Reman that is important?
Also, does anyone know what the minimum voltage is needed for this truck to function properly?
Last edited by tjtoytaco; Jan 18, 2007 at 10:42 PM.
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replaced my alternator nothing. Had both batteries checked they were good. Took it to ford. said there was nothing wrong. still had the problem then I replaced both batteries and a new alternator at the same time.. problem fixed.