Is it a bad alternator?
03-29-2018, (Subject: Is it a bad alternator? ) 
Post: #1
Is it a bad alternator?
Periodically, not often but on my dashboard pops up truck ABS and triangle with combination over voltage 16 volts or more with buzzing. Cummins inside doesn’t shows any fault codes. After couple minutes it disappeared
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03-29-2018, (Subject: Is it a bad alternator? ) 
Post: #2
RE: Is it a bad alternator?
Use a multimeter and check ur voltage. Volt regulator may be bad in the alternator.
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 Thanks given by: Doublecoin
03-29-2018, (Subject: Is it a bad alternator? ) 
Post: #3
RE: Is it a bad alternator?
what kind of truck? engine? some history?

Jhave you checked the voltage to see if it is going that high?. 16+ volts can fry some very expensive things like ECM and cab controllers.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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03-29-2018, (Subject: Is it a bad alternator? ) 
Post: #4
RE: Is it a bad alternator?
International Prostar 2011. CM871. It’s appear for 1-2 minuets some times and after disappears
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03-29-2018, (Subject: Is it a bad alternator? ) 
Post: #5
RE: Is it a bad alternator?
may be a loose connection to the alternator voltage sense wire?.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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03-30-2018, (Subject: Is it a bad alternator? ) 
Post: #6
RE: Is it a bad alternator?
I replaced alternator (remanuf 235$ + labor) Now everything is OK!
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 Thanks given by: smorgan87
04-27-2018, (Subject: Is it a bad alternator? ) 
Post: #7
RE: Is it a bad alternator?
Alternators generally don't go bad. Its usually the Voltage regulator. The Alt on my trk is 1200.00. put a new 18$ voltage regulator on it, problem solved
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 Thanks given by: Vlad , Doublecoin




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