I have a 4455 that is driving me crazy! At 1500 rpm and below, no lights on the dash. Above 1500, I get the orange exclamation light and a alt/volt warning. I put a new alternator on, no change. I even unplugged the alternator and took the heavy hot wire off and it still does the same thing. Changes with the same rpm as before with no alternator. What else do I look for?
4455 Alt/volt light
