I saw on ebay were a 04 f150 ( they were selling a billet grill ) had replaced the amber with blue bulbs and looked pretty sharp. Anyone know how the headlight unit comes apart? Thanks

 

Apart? You just wanting to replace your turn signal blubs? If so just unbolt your headlamps and replace. You owners manual will show you were the bolts are. If your hands are small enough, you can do it with them still on the truck.

 

you may want to check with local authorities

Most jurisdictions outlaw any colour other than white and amber on the front of the vehicle.