on the left thing that sticks out of your steering wheel.. the one that controls the wiper blades n such.. turn your lights on n then pull it back towards to n click it on.. to turn it off do the same.
A 1989 Chevy truck typically uses two leadlights for high beams. Leadlights, or headlights, are usually configured in pairs on vehicles for high beams and low beams. Therefore, it is unlikely that a 1989 Chevy truck would use four leadlights for high beams. It is important to consult the vehicle's manual or a qualified mechanic for accurate information on the specific headlight configuration for that model.
Your high beams work but your low beams do not because the switch is broken that switches between high and low beams. Electrical switches wear out.
Bad bulbs or multifunction switch
The switch assembly is probably worn out and malfunctioning.
Should be like any other vehicle. (pull turn signal stick back (high beams on), pull it back again (high beams off).
To turn on the high beams in a 1970 Chevy C20, locate the floor-mounted dimmer switch, usually situated to the left of the brake pedal. Press the switch down with your foot to activate the high beams. You may need to pull it up to switch back to low beams. Always ensure your headlights are turned on before attempting to switch between high and low beams.
is a switch to change to low beam is located under the emergency brake
Bad bulbs? Bad dimmer switch?
As a guess both low beams are burnt out The daytime running and high beams are the same light filament. Or the fuse or the relay for the low beams.
None
Step on that silver button on the floor
pull or push the turn signal lever.