My high beams dont work on my lexus GS300 1999

Moe likely a bad earth for one of the lights as one light is working through another causing one to stop working

Don't forget to check the Relays.... Black boxes associated with the fuses... Also there are usually two fuse blocks ONE inside of the car on the drivers side: Under the dash, or on the side of it. TWO is under the hood in the engine compartment area either on the firewall or on one of the fenders usually close to, same side as the battery.

Did the low beams go off?.. If not, it sounds like you have a bad switch.

Try changing the bulbs.

try checking the fuse first highbeam and dipped use different fuses.

I have same problem but my low beam don't work and drl but my high beam work when flick.

is the problem solve?

high beam switch is faulty look at getting a new stalk.....

Shine your head lights on a wall either in your garage or outside wall and re-adjust your head light back to were you think you had them last. Use the high beam and the low beam settings and you will be able to beam the light were you think they should be. Common problem with most new vehicles now days, low beams don't seem to be bright enough.

My information shows that your vehicle has High beam lamps and Low beam lamps .. they are different . which one did you buy?

1) If you bought 1 that is looks like this

It is the High beam lamp

2) If you bought 1 that looks like this

It is the Low beam lamp

it does just that. twist counter clockwise.and should have a 2 wire connector