High beam won't stay on - 1998 Land Rover Discovery

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

high beam relay might be stuck on

you'd have to play with it and see if it's related to maybe a stuck fog light or simply the high beam switch is junk

not sure here but i suspect the steering column stalk control switch as the main possible cause of the fault

The switch on the steering wheel and/or the relay on the high beams is faulty

check the looseness between bulb and connector. blown fuse, lights are totally out.

It's a shorted or worn out headlight dimmer switch mounted on the column.

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.

replace driver module relay .it controls the low beam lights.