Fuse keeps blowing out..

SOURCE: How do you change the headlight bulb on a 1996 lexus ls 400

I can't tell you exactly how to do it on a lexus but generally bulbs are changed from the rear of the assembly inside the engine compartment. you may have to remove the battery if it is on that side. do not touch the bulb with your fingers as that will shorten it's lifespan.

SOURCE: no power to left front headlamp - low beam

There are relays that control the headlights in a fuse box under the hood near the firewall.. There's also a fuse box underneath the dash on the driver's side, but can't remember if it's on the underside of the dash or beside it

SOURCE: my driver side headlight not working replace bulb

it also could be a bad wire or ground give these websites a try www.alldatadiy.com and www.autozone.com stop by your local Lexus dealership in the parts department and they be able to print you off the pictures and diagrams you will need if all fails stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.