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1999 Dodge Ram Voltage Regulator or Recifier Bridge

Tiny
TOMMY E
  • MEMBER
  • 1999 DODGE RAM
Engine Mechanical problem
1999 Dodge Ram V8 Two Wheel Drive Automatic

Friend heard a beep in his truck, MIL came on, charging gauge pegged to 18 volts. He shut it off, restarted it problem gone, 2 weeks later same problem twice in a day. The vehicle had no drivability issues, could this be a voltage regulator problem possiby a rectifier bridge? Rec. Bridge in alternator I believe, what about regulator is this an computer issue or is the regulator able to be serviced?
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Wednesday, April 29th, 2009 AT 10:15 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check alternator fuse 140amp

18 volts hmmm- overcharging find it quick battery could blow up. Sounds like the computer controlled of the field generation circuit


http://www.2carpros.com/forum/automotive_pictures/12900_computer_field_generation_ckt_1.jpg

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Wednesday, April 29th, 2009 AT 11:39 PM
Tiny
TOMMY E
  • MEMBER
  • 2 POSTS
Sorry truck is an 01" not 99" would this make a difference? It has the 5.9L, checked it out today with Matco scan tool, got a PO455 and one other code related to charging voltage too high (DTC not in front of me). Not sure where alternator fuse (140A) is located, could not read schematic you included in reply. Also volt gauge is only sporatically at 18v with no drivability issues, fuse would not cut in and out would it?

Thanks again,
Tommy
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Thursday, April 30th, 2009 AT 4:43 PM

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