i can not get the lights the stop plusing i have a new reg good groungs and today i made a new harness going from the alt the the reg back to the battery with no breaks didnt help at all what could this be im out of idea and would realy like to fix it

 

if they are dimming after truck warms up try disconnecting the grid heater. may be bad sensor is calling for grid heat all the time.
Clark

 

thats what I was thinking also...

 

My lights have a small pulse at idle. Rev the motor and it speeds up too, almost going away. I've installed an external reg. Not much of a problem, just thought I'd chime in.

 

nope it does it all the time it does it worse at a idle i do have the external reg. idk what it could be would love to fix it

 

Sounds like a bad diode in the alt. have it checked. it will charge with one bad, but will pluse the lights a you speak of.
Hope this helps you.
TOMMY