04-03-2024, 12:06 AM
Before switching around the headlights or the controller(s), check the headlight connector. There might be some corrosion or something is shorting inside the harness or one of the controllers.
My S60 has only 1 controller, the other one (small on the side) is not a controller, it's balancer and not a controller. I don't know what is the purpose of other ones on your car.
You mentioned that you switched the headlights but you did not say if you swapped your original all 4 controllers from the original headlight to the used one you got. If you have not, try that after verifying that you don't have short in the wire.
My S60 has only 1 controller, the other one (small on the side) is not a controller, it's balancer and not a controller. I don't know what is the purpose of other ones on your car.
You mentioned that you switched the headlights but you did not say if you swapped your original all 4 controllers from the original headlight to the used one you got. If you have not, try that after verifying that you don't have short in the wire.