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Rear Intercom Ports
From left to right
Power Wires
The wires are protected by a boot for strain relief. Never dangle, pull on or hang the intercom by
the power wires. The red wire has a 2 amp (“F2AL250V” Length = 28.5 mm by Diameter =
5mm) glass fuse. The red wire should always be connected to the “Positive” 12-volt connection.
The black wire should is a ground wire and should be grounded to the 12 – volt ground or
suitable body ground on the vehicle.
PTT
The Push To Talk (PTT) is a 3.5 mm TRS connection that uses the Tip and Ring to make a
simple switch to activate the radio PTT so you con broadcast outside the car.
Radio
Radio connection is a 3.5 mm TRRS connection that allows the user to connect a radio to the
intercom. The connected wire should be a heavy shielded TRRS with 22 gauge individually
shielded wire or large to prevent resistive heat buildup. The intercom pinout is below:
Audio Out
Audio out is a 3.5 mm TRS connection that allows the user to connect to an external speaker,
action camera or other media device. It is an analog audio out.
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