Because it is burnt out. Change the bulb.
replace passenger side low beam headlight
If you haven't already, replace the headlight. Chris
There isn't a high beam relay but there are headlight relays located in the engine compartment. There are two, one of the driver side and one for the passenger side.
i have a 99 dodge sport ram 2500 passenger side headlight is not bright and the two in side lights dont come on at all why?
you press that one button 5 times and it will do it automatically!!!! foo
Check socket for a loose connection or broken pinCheck headlight for broken tabCheck wires for an open circuit or cut wire
Use a 12 volt tester and turn thr lights on and see if you have power, then make sure the bulb is a high/low beam.
Passenger side or driver side? BClear. The low beam is built into the same bulb as the high beam. Just pull the bulb out from behind the housing under the hood and replace it. If the low beam doesnt work you have to replace the whole bulb. They're not very expensive.
There may be a poor connection or a burned out fuse for the driver's side headlight. There may be a poor connection or a burned out fuse for the driver's side headlight.
REPLACE THE PASS SIDE HEADLIGHT
Possibly the high beam element for the passenger side is broken. There are two elements inside those lightbulbs, one for low beam, the other for high beam.
The headlight has two filaments. One for the high beam and one for the low beam. The most likely reason the high beam is out is because the high beam filament is broken. Replace the bulb and it should fix it.