Flummoxed: Alternator light
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Lead Driver
Joined: Jul 2013
Posts: 9,266
Likes: 151
From: In the field...
Flummoxed: Alternator light
I normally read in this section and don't ask questions or start threads in this section, however; I have not been able to find an answer to this condition.
Background:
'01 Excursion 7.3 4WD, 264,xxx miles, batteries less than three years old, new alternator (https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1) , using an Edge Insight for digital readings.
Problem:
I replaced the alternator about three weeks ago, first week all normal. Second week alt/battery idiot light comes on, then to add more frustration it is consistently inconsistent in its reading.
The volts (upon starting) jump around 11.6 - 12.1 when first starting. The light comes on while accelerating and goes off during no throttle while cold.
After warm-up the light will come on intermittently even though the reading is 13.0>, but never during off throttle.
It seems to do this more when cold but it does not completely stop when it's warm. Yes, I don't think that should be a factor but it is a reality .
I'm thinking it's a bad voltage regulator.
Thanks in advance.
Ideas, thoughts, questions...
Background:
'01 Excursion 7.3 4WD, 264,xxx miles, batteries less than three years old, new alternator (https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1) , using an Edge Insight for digital readings.
Problem:
I replaced the alternator about three weeks ago, first week all normal. Second week alt/battery idiot light comes on, then to add more frustration it is consistently inconsistent in its reading.
The volts (upon starting) jump around 11.6 - 12.1 when first starting. The light comes on while accelerating and goes off during no throttle while cold.
After warm-up the light will come on intermittently even though the reading is 13.0>, but never during off throttle.
It seems to do this more when cold but it does not completely stop when it's warm. Yes, I don't think that should be a factor but it is a reality .
I'm thinking it's a bad voltage regulator.
Thanks in advance.
Ideas, thoughts, questions...
Butt-Head
Joined: Apr 2004
Posts: 9,464
Likes: 2,943
From: Reed Point, MT
The ONLY thing that can cause the battery light to illuminate on a 2001 is the voltage regulator or the ignition feed wire being shorted to ground. My guess is loose regulator mounting screws. They come loose pretty regularly.
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Lead Driver
Joined: Jul 2013
Posts: 9,266
Likes: 151
From: In the field...
It usually charges at 13.9 - 14.2 after it's warm.
Thanks for that, will check.
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