V50 L5-2.4L VIN 39 B5244S7 (2005)
Headlamp Control Module: Description and Operation
Component specification, Gas Discharge Lamp Module (GDL)
Front axle sensor and rear axle sensor
The sensors sense the angle of the vehicle at different loads and send the information to the "master" of the two Gas Discharge Lamp Modules (GDLs).
The "master" Gas Discharge Lamp Module (GDL) then sends control signals to the motors that regulate the beam length.
The resistance between connections 1 and 4 changes linearly depending on the angle.
One of the position sensors is located next to the rear axle and is connected to the left rear control arm via a link system. The other position sensor is
located next to the right front axle and is connected to the right front control arm via a link system. The vehicle's angle is measured by the sensors being
affected via the relevant link system.