Hey Guys!
My 2006 F-150 KR has a problem keeping the battery up. If I drive every couple of days, it's fine. But if it sits for more than 4, it has a dead battery. I have cleaned/replaced the battery. When I hookup the battery charger, the headlights stay on. Could it be the relay sticking? If I have the light on Auto, it happens more frequently...
I think it's in the headlight system, but am not sure which relay...
Thanks for any help!!

Muryl

 

I only have the 2007 F150 Users Guide, but pages 273-280 pretty much covers all relays and fuses and positions.

 

You can download the owner's manual if you don't have it.