Your wire connection to your headlights from your fuse box might be loose or broken somewhere. Try running a jumper wire from your headlights to the fuse box. If the headlight work when you try this, then your wiring has an open circuit and needs to be replaced, or fixed.
First check the bulbs then check the fuses.
faulty switch
All fuses are under the hood. The computer on the fuse box runs the headlights without fuses. It is all done internally. If you bulbs are ok, you need to have the FCM checked for codes.
Check the fuses and the bulbs.
Bulbs? Fuses? Relay? Dimmer switch? Headlight switch?
pull one out and put the new one in
The switch.
The fuses on the 2000 Dodge Durango should be labeled for each part such as the tail lights. The tail light fuse is a 30 A.
Check bulbs, fuses, and check for wiring problems
Check the bulbs and check the fuses.
The fuse box in a Dodge Durango is under the dash on the drivers side of the vehicle. It is located to the left of the park brake pedal. To get to the fuses to replace them, you need to open the cover.
The circuit is simple .... headlamp bulbs to relay to fuses to switch .... ttroubleshoot those items and you'll find the glitch