Light switch

Brief description of components

Light switch

The light switch consists of

• Rotary switch for side lights and low beam as well as Automatic Light Control (FLC) with light emitting diode FLC for driving light control
  
• Button for rear fog light
  
• Potentiometer for dimmer of panel illumination
  

The rotary switch for side lights and low beam has two switch contacts. Depending on the status of the two switch contacts, the light module can detect four switch positions:

S_SL = interior switch for side lights

S_AL = interior switch for low beam

1 = interior switch closed (after 5 V)

0 = interior switch open

Power supply: The switch is supplied with 5 Volts by the light module.

If the power supply is defective, the light remains ON: the light is automatically switched on if

• the cables to and from the light switch have been cut or
  
• are switched to ground
  
• are at 12 V.
  
• For safety reasons, the light switch can only be switched OFF if there is 5 V at both switch outputs to the light module. If a short circuit means that there is once 5 V and once 12 V, the light can not be switched OFF: low beam and Automatic Light Control remain ON.
  
• High beam and headlight flasher only run if the steering-column lever is held.
  
• The indicator light only runs if the steering-column lever is held. no continuous flashing, no automatic reset