My 2005 Lariat dies if it sits for more than a couple days. Where should I look to fix this. I have a multimeter and a pretty good understanding of 12v DC

 

I have been trying to remember the exact procedure, but I THINK you disconnect negative from battery then put test light across positive (test light hooked to negative), and if lights bright you have a draw, I asked on here coupla days ago to confirm this is right, I have a 625W linear in my truck and even off it was still somehow on and draining battery and this was how I found it, now I just pull fuse from box when not using. Hopefully someone can chime in if I got it right and good luck.

 

did you check alt output?

 

I've had the same issue on my 07 for years now ... heck it just died this morning

Only in cold weather it's a real PITA