It seems to be an intermittent thing the past 3 days. I have done some research and it all points towards the 80 amp fuse or the alternator which I can see because my alt appears to have been in the truck for a long time, might even be original. The weird part is that when the truck is at a higher RPM (4000k or so) they all come off and sometimes they don't come on at all and I can drive a good 50 miles without seeing them once. Sometimes when I rev it up to 4000k they will turn off and not come back on, sometimes they come back on right when I shift and the rpms drop. I have also had some sort of starter problem where sometimes my starter will act like the battery is almost dead but if I bang it with a hammer it will perk right back up. I haven't had a problem with the starter for a week and my warning lights on the dash have only been popping up for the past 3 days. My truck has not died and the headlights don't dim or anything like that. Any thoughts? Should I just quit messing around and replace the old alt and starter? Could any of these problems be related to my recent 5 speed swap?

 

your alternator is going out...

 

I hope it can live a week