So my high beams stopped working last weekend, so did basic troubleshoot, low beams work, indicator on dash works, went to owners manual for assitance and checked related fuses, so according to the owners manual relay R03 is for Hi-beams could this be the problem or is there something I'm overlooking other than going to the dealership? Thanks.

 

Did you check to see if you need new bulbs ?

Did you check the high beam fuse ? ( you do not make note of which fuse(s) you checked, or how you checked them )

This is assuming you did not modifications to the truck, is this the case ?

 

SSCULLY,

I did check fuses in the fuse box that were relevant, and no to electrical mods. Could both bulbs go at the same time?

 

Possible but not probable.

Do the high beams work with the FTP mode ?

Did you check the bulb connector with a meter, to make sure you have power at the bulb connector when the main headlamp switch is on, and the MFS pushed forwards ?

 

OK, I'm not hip with the acronym FTP.

 

Flash To Pass - owners manual has this in the controls section I do believe.