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Make these connections only after verifying the proper circuit on your radio harness with a
voltmeter. With the key OFF and the negative test lead of the voltmeter rmly touching a
bare metal chassis part of your car, begin probing the wires in the main radio harness with
the positive test lead. The constant 12V+ circuit should read a continuous 12 volts or higher.
Once you’ve identied the constant 12V+ circuit, strip back about 1/8” of the insulation. Now
take the positive test lead and insert it into the wire stranding so that you can now probe for a
suitable ground location in the dash cavity using the negative test lead. Bare chassis metal
is the recommended ground spot. The voltmeter will read a constant 12 volts or higher when
you have found a good ground point. Attach the BLACK ground wire to this spot with either
an existing bolt or screw or use a metal piercing screw. You also have the option of splicing
into the ground wire in the main radio harness. Probe the remaining wires with the negative
test lead until you again nd a circuit that reads a constant 12 volts on the voltmeter. When
you’ve found a circuit that reads constant 12 volts, turn the dash light dimmer control to make
sure you have not probed the illumination dimmer circuit. If the circuit continues to read a
constant 12 volts or higher regardless of the dimmer position, you have found the ground
wire. If not, continue testing until you do. Some vehicles do not have a ground wire in their
main radio harness and instead ground through their mounting brackets to the dash. In these
cases, you will have to ground the black wire to the bare metal chassis inside the dash . Once
the ground wire is connected, please nish your wiring connections by splicing in the external
YELLOW wire from the vehicle specic harness.
Vehicle Specic Harnesses that require wiring connections:
PXHFD1 – connect the Yellow wire to constant 12V+ & connect the Black wire to ground.
PXHFD2 – connect the Yellow wire to constant 12V+ & connect the Black wire to ground.
PXHFD3 – connect the Yellow wire to constant 12V+ & connect the Black wire to ground.
PXHGM3 – connect the Yellow wire to constant 12V+ & connect the Black wire to ground.
PXHVW2 – connect both the Black and Black/White wires to ground.
2.4 Installation at the CD Changer Location
In this section you will learn how to install the PXDP in the factory CD changer location. If your
vehicle is equipped with a factory CD changer you will need to disconnect it from the factory pre-
run harness in order to connect the PXDP interface. If your vehicle is not equipped with a factory
CD changer, you will need to locate the factory pre-run harness. This may involve the removal of
the; center console, glove box, or carpeted side panels in the trunk. Please consult your vehicle’s
dealership or a local car audio professional for instruction or assistance with locating the factory CD
changer connection if necessary.
1. Connect your vehicle specic Harness to the factory pre-run CD changer harness in the
vehicle.
2. Make any necessary wiring connections on your vehicle specic harness. Please see
section 2.3 for details on making these wiring connections.
3. Now that the interface is connected to the radio, you will need to test the operation of the interface
before permanently running the white iPod docking cable or re-assembling the dash. First, connect
the white iPod cable to the iPod. The iPod should indicate that it is being charged. Turn on the fac-
tory radio and press the button that would activate the factory CD changer to select the iPod. It may
take up to three minutes for the interface to initialize to the radio (this only happens the very rst
time you select the iPod). Once the iPod has been selected, press Play on the iPod. You should
be able to hear the music on your iPod through your factory radio. Now press the “Next Track”
button on the radio. The iPod should change to the next song on the iPod. By pressing the “Previ-
ous Track” button on the radio the iPod should change to the previous song. With the operation
of the interface conrmed, you may continue with the installation. If you experience difculties in
operation, please see our troubleshooting chart in section 3.2.
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