4.0 Liter, Altenator voltage out put??? - JeepForum.com

 
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post #1 of 3 Old 02-21-2003, 01:17 PM Thread Starter
Birdawg
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4.0 Liter, Altenator voltage out put???

Heard a belt squeel once in a while, usually on start up but sometimes while running, and noticed that when the squeel was going on the volt meter drop back to discharge and then pop back up to charge. Checked the code and have a Low Generator Voltage code flash at me. Checked the voltage with a meter and it is putting out about 14 volts when not squeeling. Can't catch it to meter it when it squeels, it's too quick and intermitant, 5 or 10 seconds at a time. I can't feel any side to side play in the pully. Belt seems to be tight enough. Could the diodes in the altenator go intermitantly like that?? Cause the altenator to discharge and drag to make the belt slip past the pully and make it squeel??? Does any one know what the altenator out put voltage should be?? What does your volt gage read normaly?? Thanks.


1992 YJ 4.0 Liter HO I6
Sitting on a Rock in the Bay
Air Restrictor & Chicken Bones Gone,20 Gal.Gas Tank :) Audiovox CD Sound Bar, Front Tow Hooks. Hard & Soft
Tops. 31" x 10 1/2" x 15" Coopers
Sumer Projects:2 1/2" Rubicon Express.(Done) New Metalic Paint.(Done)
31" Tires (Done), Bed Liner. Dome Light for Soft Top
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post #2 of 3 Old 02-21-2003, 02:22 PM
DirtyDan
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Have you checked for play/wear in the bearings of the alternator? If the bearings are locking you would get a burnt rubber smell if the belt is slipping. Remiove the belt from the alternator and spin the rotor and check for any resistance.

Dan
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post #3 of 3 Old 02-22-2003, 03:18 PM Thread Starter
Birdawg
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A guy in another forum suggested belt dressing. I picked up a can at the hard ware store today and sprayed the belt. Drove around a quite a bit today and no squeeling! Turns out the belt was slipping. I do need a new belt, just ordered it today.
Thanks

1992 YJ 4.0 Liter HO I6
Sitting on a Rock in the Bay
Air Restrictor & Chicken Bones Gone,20 Gal.Gas Tank :) Audiovox CD Sound Bar, Front Tow Hooks. Hard & Soft
Tops. 31" x 10 1/2" x 15" Coopers
Sumer Projects:2 1/2" Rubicon Express.(Done) New Metalic Paint.(Done)
31" Tires (Done), Bed Liner. Dome Light for Soft Top
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