Low bean do not workink I change computer twice what could be. The hibean working all the lights working, just the low bean

You have a bad ground.

Hi,make shore when you put new bulb in that you dont put your hands on the glass as will leave oil on the bulb and shorten the life,(maybe you already new that)I had a brake light that did the same thing,and now its bean over a year since I had to replace it, hope this was some help, all the best.

You have a broken ground wire. There is one for each light. mounted to the body, close to the lights.

check fuses.
check head light relays.

it can only be 2 things
1: bad combo switch (light switches in steering cluster)
2: bad wiring.
this assumes the car does not have DRL.
day light running lights.
i simple tool called a voltmeter finds this fault easy.
do yo have one?

Check dimmer switch, replace if needed,'

Check light sockets and wires, replace as needed.

Check for relay if applicable.

Someone will need to check for voltage at the dimmer switch and then trace back to the fuse box as needed.

Don't know the vehicle but I would check relay if fitted then the switch

your low beam bulbs are bad they go for about 21.00 dollars for a pack of two

check your fuse box on the inside is a diagram of all fuses check the one that says low beams could be blown