lights (low beam) on 1990 Chevrolet 1500 Pickup

all lights work on my 88 chevy silverado but low beam doesn't work. change one bulb and headlight switch inside cab, still do not work

1 answer
This could be a problem with the high beam dimmer switch. It sounds like you may need a wiring diagram to find the fault with your low beam lights. I may be a good idea to invest in a repair manual before you try any more parts.