Volkswagen Caddy 2004 Self-Study Programme page 55

Outside light control
The onboard supply control unit evaluates the signals from the light switch directly. The information on
switching on the turn signal, the main beam lights and use of the flasher lights is sent via the steering
column electronics control unit J527 and the CAN convenience data bus.
Functional diagram
F
F4
Terminal 15
Terminal RFL
Terminal FL
Terminal DDL
Terminal 56
Terminal 58
E1
Terminal 30
D
Terminal 15
E4
E19
J527
Legend
D Ignition switch terminal 15
E1 Light switch
E4 Switch for headlight dipper and
flasher
E19 Parking light switch
F Brake light switch
F4 Reversing light switch
J519 Onboard supply control unit
J527 Steering column electronics control unit
J519
CAN data bus convenience
Term. 56 Driving lights
Term. 58 Side lights
Term. RFL Rear fog light
Term. FL Fog light
Term. DDL Day driving light
Function needs to be coded in the
onboard supply control unit.
The codes differ from country to
country
M25 High level brake light bulb
X Number plate light
X
M25
S328_174
55