== == It's on the floor sometimes hidden by the carpet.
It is on the signal light switch. Pulling it toward you will change from High to Low beam lights and vice-versa 7T77T7
The 1971 Corvette High Beam headlight switch is located on the floorboard, actuated by the driver's left foot, like most cars of that period. However, Corvette hid it under the carpet, with a reinforced pad molded into the carpet over the switch location. Neat huh?
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.
if you've tried hitting the high/low beam switch & headlights are out on both, then a bad headlight switch or headlight switch plug or high/low beam switch plug not fully engaged.
The high beam switch is on the reverse of the turn signal switch arm
== == more than likely your dimmer switch is bad,hope that will help
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.
Probably the high beam switch in the steering column is bad.
you will probably have to replace the headlight switch.
ignition switch faulty