The system for the horns is supplied through the horn relay T3 of the engine compartment control unitB1B from the direct line from the battery through fuse F3 located in junction unit B1A.The coil of the relay is energized by an earth signal when one of the steering switches is closed. The relay thereby supplies the high tone hornP10and the low tone hornP11.The connection for the horn contact is via the clock spring connectorD47, which also transmits the signals for the driver''s Air Bag and the steering wheel controls (for radio and telephone). See E3510 RADIO See E7030 AIRBAG