Voltage issue

[CdnSldr Mega Cab]

I run a 2006 1500 Mega Cab, Hemi Stock. I don't have any electrical modifications in the truck. Recently I've noticed while sitting idle, the voltage gauge drops and the check engine light comes on, when I rev to 1500-2000RPMs, the gauge climbs again and the check engine light goes out. I basically cannot have any auxiliaries (fog lights, heater, heated seats and defroster) running to keep this from happening, unless I want to keep my foot on the gas all the time.. Wondering if anyone out there has had the same type of issue before? Was it a Voltage Regulator or Alternator issue? I should point out its a brand new battery in the truck. Any help to prevent extensive testing and cost would be greatly appreciated!

 

[Ratket]

sounds like altanator issue

 

[NYCruiser]

Check the belt tension

 

[MADDOG]

Check the belt tensioner, check belt condition and test that alternator. Also it would be a good idea to load test the battery.

 

[blackbetty14]

Sounds like the alternator voltage regulator has gone bad. Get Ready For A New alternator! Not sure if you can rebuild them or have kits available for that.

 

[audio1der]

.
Find a 'Part Source' near you ; they do a full electrical system test for free. Make sure they are testing the alt and not just the batt.
But checking belt condition/tension first is an easy first step.
Mind you, shouldn't it be under warranty??

 

[NYCruiser]

.
shouldn't it be under warranty??

Not unless he has an extended one. Truck is an '06