The high beam switch is on the reverse of the turn signal switch arm
check the fuses then check high/low beam switch
you need to replace the high/low beam switch
Check fuses and high/low beam switch.
It is on the signal light switch. Pulling it toward you will change from High to Low beam lights and vice-versa 7T77T7
Probably the high beam switch in the steering column is bad.
you will probably have to replace the headlight switch.
The dimmer switch if for the instrument panel lights. The high and low beam switch is for the headlights. On most older cars the high and low beam switch was on the floor. Most cars have it on the turn signal lever now.
The switch or the relay, check the cheapest, or simplest thing first, which could be the relay, but the symptom points more to the switch.
The dimmer switch is located on the turn signal switch. Pull it toward you to switch from low to high or high to low beam lights.
The high beam switch for the Subaru Liberty is located on the left side of the steering wheel. It is on the same lever that the cruise control is located. The lever is either forward or back depending on whether high or low beam is wanted.
My two guesses: 1Your high beam bulbs may be burnt out 2the high beam/low beam switch may be broken.
Dimmer switch is possibly defective