Headlight systems use a fuse for the headlamp switch, but they use relays for the headlamp bulbs themselves. Most often there is one for each bulb and it is in a relay box under the hood.
\015\012Check there first. Your owner manual should tell you where your fuse panels and relay boxes are and have a chart to identify whcih relays control the headlamps.
\015\012Here's a couple of tests to help narrow down your problem.
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• Do your high beams work? This will tell you that the grounds and some of the wiring is ok if the high beams work.
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• Does your flash to pass work? That will also tell you if the high beam bulbs are ok.
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• Do your parking lamps work, front and back? This will give more confidence the switch is good, if they work.
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• Do your front parking lamps work when the headlights are on? More confidence in the switch being good.

\015\012Some vehciles use a Lighting Control Module that controls a lot of the lighting functions. If that is bad, it is very expensive, like $400. You an call your dealer and ask the service department what is the most common failure of the headlamps and if you have a lighting control module.
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\015\012Start there and let us know your findins so we can further advise you. I' m sorry I don't have shop manuals for Dodge trucks so I can't provide a wiring diagram. Good luck.

Check the headlight relay located in the fuse panel in the engine compartment near the battery