Lights dim at high rpm's
03-26-2011, 03:14 PM
#1
Junior Member
Thread Starter
Join Date: Apr 2010
Location: Michigan
Posts: 13
Likes: 0
Received 0 Likes
on
0 Posts
Lights dim at high rpm's
I just bought a new battery so I know it's not that. But when I get on my truck, my lights start to dim right around 4000-5000 rpm's. I was wondering if this could be from a bad alternator possibly. Any help is appreciated.
03-26-2011, 03:48 PM
#2
Check your serpentine belt and make sure it's not worn or stretched out and slipping. It could also possibly be the alternator, but check the belt first. Rev the truck by pulling on the linkage at the throttle body and listen for a squeal and watch the belt and pulleys to see if it looks like it's slipping.