If adding to an existing installation, please contact Technical Support to ensure the feature is enabled.
The installation kit contains the Garmin traffic cable, two 8 in. (3 cm) cable ties, ring terminal, star washer, and self-tapping screw.
Additional tools you may need include a cordless drill, multimeter, Phillips bit, wire stripper, electrical tape, and insulated crimper.
Installation Steps
The following steps provide an overview of the installation process:
- Install preparation.
- Cable installation.
- Device connection.
1. Install preparation.
- Remove a-pillar plastic and dash panels.
- Using a digital multimeter, find an ignition circuit providing +12 VDC when the key is in the On position and +0 VDC when the key is in the Off position. Once located, remove keys from the ignition.
- Identify a suitable chassis ground location.
- Remove a-pillar plastic and dash panels.
2. Cable installation.
Locate Garmin traffic cable, wire stripper, ring terminal, star washer, ground screw, and cordless drill.- Remove 1 in. (2.5 cm) of insulation from both the red and black wires of the Garmin traffic cable and twist the wire strands of each wire.
- Locate the wire identified in Installation preparation Step #1.2.
- Find a loose section of the wire and remove 1 in. (2.5 cm) of insulation and separate the wire strands using a non-conductive tool to create a loop.
- Insert the Garmin traffic cable red wire into the loop, squeeze the loop shut and twist the Garmin wire around the vehicle wire at least three times.
- Generously wrap the connection in electrical tape, crossing over the insulation on both sides, and place one (1) cable tie directly over the wire-to-wire connection.
- Create a stress loop ~1 in. (2.5 cm) away from the connection and secure with cable tie.
- Route the Garmin traffic cable black wire to the area of the chassis ground identified in Installation preparation #Step 1.3.
- Fold the wire strands in half.
- Insert the wire into the ring terminal and crimp the ring terminal to the black wire.
- Slip the star washer over the self-tapping screw first, then over the ring terminal.
- Screw the wire to the chassis after ensuring there is nothing behind the mounting location.
- Route USB end of the Garmin traffic cable through the dash and out the a-pillar area, leaving only enough cable to go from the windshield to the rear most section of the a-pillar base, before putting the a-pillar plastic back into place.
To prevent damage from the USB connector falling in the door jam, run the Garmin traffic cable between the a-pillar plastic and windshield and do not exceed the a-pillar.
3. Device connection.
- Route AUX end of the cable to GPSI-3900/4000 mounting location, behind the dash cluster, and connect it to the AUX 2 port on the GPSI-3900/4000 device.
- Route AUX end of the cable to GPSI-3900/4000 mounting location, behind the dash cluster, and connect it to the AUX 2 port on the GPSI-3900/4000 device.