Truck is a service vehicle that has had timely service its entire life

Tiny
AVG
  • MEMBER
  • 1997 FORD F-350
  • 15,000 MILES
Battery charge light on while idling goes out when accelerating, huge power loss battery and alt check good what else can it be?
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Wednesday, September 21st, 2011 AT 9:31 PM

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Tiny
PROMECHANIC
  • EXPERT
I would first try getting the battery tested.
This could be a problem with your alternator belt as well. You should inspect it. See if it is nice and tight.
Check your battery cable connections. They should be clean and tight.
I don't know how the alternator was checked but it should be "load tested". This is a specific test that is more reliable than simply checking to see what the voltage is when it is charging.
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Wednesday, September 21st, 2011 AT 9:57 PM
Tiny
AVG
  • MEMBER
Ok one more time the battery and alt cheked good what else could it be I wouldnt be here if it ha dtured out to be either and they were properly tested and the battery cables and connectors are in good shape so whats next on a priority list im not an expert but is there something after those have been found to be good.
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Wednesday, September 21st, 2011 AT 10:43 PM
Tiny
PROMECHANIC
  • EXPERT
OK. What is the battery voltage when the truck is not running? What is the voltage when it is running?
Let me know and I can help you more.
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Wednesday, September 21st, 2011 AT 10:45 PM
Tiny
AVG
  • MEMBER
Ok while the engine is running the voltage from the battery reads 12.42 with engine off it reads 12.06
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Thursday, September 22nd, 2011 AT 12:00 AM
Tiny
PROMECHANIC
  • EXPERT
OK. The first thing that needs to be addressed is that your battery needs to be charged. It should have a minimum of 12.65 volts with the engine off.
The second thing is that your alternator is not working at all. With the engine running it should read a minimum of 13.5 volts or so. This may be because the alternator is bad, or it might be because the belt is slipping or it might indicate that there is a wiring problem in your charging circuit.
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Thursday, September 22nd, 2011 AT 1:36 AM

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