I have a 2000 dodge ram 1500 5.9L gas and i am having a problem with high voltage it runs a little over 14 most of the time but every onice and a while it will jump all the way up to over 18 volts , have to shut the truck off and start it again , I have heard that the voltage regulator in built in the ECU not the altinator , anyone know if this is true ? and if it is is thare a way i can bypass it instead of going broke on a new ecu ????
Thanks alot

 

Search?

 

thats was kinda the first thing i did !

 

Im sure this has been brought up before, didnt want to sound like a D*ck or anything, someone will chime in and most likely get you fixed up

 

Ok sounds good , yah i searched it thinking that it was a pritty common problem but apperantly its not !! anyone have any thing ??

 

i was told the gadge was what the alt. put out. but i dont know if its true

 

Yes, the ECU does control the alternator. It can be bypassed by using a regulator from the earlier Dodges. I haven't done this but I read about it on one of the Dodge sites. Don't remember which one it was on.

 

Thanks charlie1935 I heard the exact same thing now i am just trying to figure out how to do it , well i am glad that someone else heard about it , hopefully someone here will be able to give me some more info ,
Thanks !!!!!!

 

Why do you have to shut down your truck?

The voltmeter is connected to battery via the ingnition switch, it is not directly connected to the alt.

Are you 100% sure it's not a bad field in your alternator? I would have the alternator checked before I started fooling with the PCM.

JMTC

 

Mine does the same thing when i put a volt meter on it while running says 14.6 volts. The gauge sits between 14 and 18 but i do know i need a new battery but not sure if that will fix it.