Reverse Backup Signal Wire (VIOLET/WHITE): (used to turn on the camera automatically in reverse):
1. Remove the screw cover from the A-pillar trim molding (it just snaps out).
2. Remove the Phillips screw.
3. Pull the molding toward the inside of the vehicle, and upward to remove from vehicle.
NOTE: If you have side air curtains, there is no problem removing the A-pillar molding. The inflater module and all the electrical contacts for the side air curtain are in the back, by the C-pillar. Only thing in the A-pillar for the side air curtain is the tie down strap, attached to the frame. Do I need to say, ?Do not mess with this strap??
4. Look for a brown wire in the harness. If you have two brown wires, then you have to check which brown wire is the reverse signal wire from the trans selector. I used a voltmeter and a pin, and tapped both wires. With the ignition On, move the trans lever into Reverse. The correct wire will show battery voltage in reverse, zero voltage in any other gear.
5. Using the little connector that is attached to the Violet/white wire, splice this wire into the brown reverse signal input wire. Note, the violet/white wire has a resistor in line for the new head unit.
6. Route the wire down, inside the kick panel, over the steering column to the radio area.
If you are installing the microphone wire under the A-pillar molding, now is the time to do so.
Vehicle Speed Sensor Wire (Pink):
On some early model H3s, the dark green/white speed signal wire is in the 12-pin connector at the radio. It is located in terminal E of that connector. However, be careful, terminal H of the same connector also has a dark green/white wire that is the signal in from the XM radio receiver. If you look at the connector end, terminal E is noted in the illustration.
If the speed signal wire is not in the connector:
1. Remove the right kick panel.
2. You will see a large connector in the kick panel area.
3. Look at terminal A8, there should be a dark green/white wire on one side of the connector and nothing on the other side. This is your speed signal wire.
Tap into the speed signal wire:
4. When you locate the speed signal wire, tap into it using the splice in the NAV package.
XM Receiver Install:
Thanks to BuzzH3 for an idea on the location of the XM receiver, the location was perfect. The only thing I added was quarter-inch foam tape to wedge in between the XM receiver and the OnStar module to prevent any chance of rattles. As Buzz stated, just push the small bracket at the bottom slightly forward toward the OnStar module, and the XM receiver slides right into place.
1. Install the XM receiver with the connectors? locations up.
2. Look into the radio location area under the dash and then look to the right. You will see the XM module mounted horizontally. The Greenish square connector toward the rear is the XM antenna you will use for the Pioneer XM receiver. Push on the bottom of this square connector, and pull the connector from the XM box.
3. I then did some modification to the GM XM antenna connector to allow it to attach to the Pioneer XM receiver. I put a slit into one side and snapped it into place. You probably could completely remove the connector (slide out the white terminal device on the green connector) and remove the wire, then insert it into the wire connector that came with the Pioneer XM antenna. I found it not necessary.
4. Attach the XM antenna to the Pioneer XM receiver.
NOTE: If you are installing Sirius, I would guess the installation is the same, and the GM antenna might be able to be used. But I do not know if the receivers are the same size, or the antenna is the same.