High beams stay on low beams an dashboard doesn't come on happen after change lightbulbs

It could be driving lights mode instead of low beam. Check connections.

high beam relay might be stuck on

check the dimmer switch, I had the same problem. this dimmer switch didn`t dim on low beem but went out on high beams, turned the dimmer switch up and down/on and off and it came back on.

Sounds like it's in the actuator itself - the part that you move on the steering wheel or dash to put the high beams on or the headlight switch itself.. Find the ground wire on the headlights and run a new wire from that directly to the body somewhere so it gets a good ground, or directly to the neg side of the battery.

check the voltage output from the alternator

Need new lightbulbs. Lowbeam will still work evan after highbeam elament is burnedout in bulb. If separate bulbs are used for high and low beam,then change high beam bulbs only. If does not fix then check fuse or wires and make sure plug to bulb is in correct position. But probably just need new bulbs.

You have a bad electrical connection. Check the wiring harness and both sides of it's connectors for corrosion and or breakage. The connector terminals will become worn and corroded and the wiring sheaths a prone to weathering and become brittle. Replace or clean as needed.

when the low beams quit try switching from high to low and back and see if low beams stay on, if they do it may be the dimmer switch, if that doesn't change anything suspect the headlight switch.

Your low beam is a HID bulb, number D2R, and your high beam is a halogen 9005 bulb

it very possible it could be in the switch itself but check the relay first which is usually located under the hood in the relay box