Gents,
I have an 05 FX4 Crew and all of a sudden my DRLs and Auto Headlamps stopped working. I replaced the relay in the box on the fender under the hood, driver side, and still nothing...any suggestions? Could it be a fuse, is it controlled somewhere else? Any suggestions would be appreciated. Lights work fine on manual, both bright and dim. The lights do not come on when I use the keyless like they used to either? HELP!

 

Could be a short somewhere. Try using a volt meter to make sure it is getting power.