15
Different connections of the ISO plug on the radio
The layout of the pins on the ISO plug used in a car depends on the type of car. Before using the switch
box, you should make sure that the connections are correct in order to prevent possible damage to the
device.
Configuration I
If the assignment of pin 7 of the ISO plug is connected to the DC Power Supply, and pin 4 is con-
nected to the ignition, you should check if the connection looks like the connection presented on the
drawing below.
Configuration II
If the assignment of pin 7 of the ISO plug is connected to the ignition, and pin 4 is connected to the
DC power supply, the connection of the cables should look like the connection presented on the draw-
ing below.
Switchbox
Vehicle
red
7 (red)
blue
4 (blue)
red
7 (red)
blue
4 (blue)
Switchbox
red
7 (red)
blue
4 (blue)
Switchbox
Vehicle
Vehicle
