schiu

Is there a relay for the headlight?

mishar

No rely. Lights are controlled by the module.

Mister Bally

We'll call it a Solid State Relay......

richard-tx

There is a little more to it than that.

Mister Bally

Well, more likely two transistors (six if you count the high beam lights and shutters on HID lamps) connected to driver PIA's connected to the microprocessor in the control module that operates the lights. Then there are the parking lights, fog lights, all of the rear lights yadda, yadda....