Press the cable clamp to pull out the light cable. Make
a note of which color of the light cable goes in which
clamp.
Dismantle the two mounting braces.
Note which of the struts is mounted on the left and
right.
Remove the four screws with which the control unit is
mounted on the luggage rack.
Mount the new control unit, plug in the light cable and
mount the luggage rack.
Replace Control Unit
Zündapp Green 7.7 / Z502 / Z503 / Z504 / Z802 / Z80S