33
Configuration II
If the configuration of pin 7 of the ISO plug is connected to the ignition and pin 4 is connected to the
power supply, you should check to see whether the connection looks like the illustration below.
In the operating manual of the radio device, you can find the pin assignment for the “mute” signal. This
signal can occur on one of three cables marked with “mute1”, “mute2”, or “mute3”.
Connect the yellow “mute” cable to the switchbox using the correct cable from the car radio: “mute 1”,
“mute 2” or “mute3”.
Attention:
The positive wires and ignition wires are protected in the casing of the switchbox with
3A fuses. For this reason a separate fuse, as shown in the next chapter, is not necessa-
ry.
red
7 (red)
blue
4 (blue)
Switchbox
red
7 (red)
blue
4 (blue)
Switchbox
Vehicle
Vehicle
mute 1
radio device
Switchbox
mute 2
mute 3
mute (yellow)