Installation Manual

14221-1850-4000, Rev. A
54
Plan the routing of the 10-AWG red wire carefully, using an existing access hole in the
vehicle’s firewall if possible. Alternately, drill a new hole approximately ½-
inch in
diameter and install a small rubber grommet (one supplied with the bracket kit) to protect
the wire from chafing at the hole’s sharp metal edge.
To prevent fumes from entering the passenger compa
rtment, this
hole/grommet/wire combination must also be sealed with a silicon-
based sealer
before completing the installation.
Do not install any wiring or fuse holder over or near the vehicle’s engine. Excessive
engine heat can cause permanent damage to these components and can lead to intermittent
electrical connection to the battery.
8.2.1 Radio Ground (Black Wire) Connection
Use the following procedure to provide a suitable ground connection for the radio:
1. Temporarily connect the radio’s DC Power Cable to the radio by mating the cable’s 3-pin connector to
the radio’s 3-pin power connector. Locking the two connectors is not necessary at this time.
2. Prepare to connect the cable’s black wire to vehicle ground by locating an area of vehicle metal within
approximately two (2) feet of the radio. This surface must have a solid and stable connection to vehicle
ground. If not, add grounding strap(s) as necessary.
3. Verify the black wire has sufficient length to reach the ground point. If not, it can be extended by
splicing a 10-AWG wire to it. In this case, use approved wiring splicing methods and materials.
4. Strip the area of any paint or dirt to expose a bare metal surface, approximately ¾-inch square.
5. Drill a hole in the approximate center of the bare metal surface and deburr it. A ⅜-inch non-insulated
ring terminal is supplied with the cable to make this ground connection. Therefore, hole diameter should
be appropriate for the utilized grounding screw/bolt size and type used to connect the ring terminal to
the bare metal surface. This hardware is not supplied.
6. Prepare the ground (black) wire:
a. Cut the black wire to the required length plus some additional length for a service loop.
b. Strip insulation back approximately ¼-inch.
c. Crimp a ⅜-inch non-insulated ring terminal (supplied with the cable) to the end of the black wire.
7. Fully connect the radio’s DC Power Cable to the radio by mating its 3-pin connector to the radio’s 3-pin
power connector as follows: Visually align the key and firmly push and turn the outer locking ring
clockwise until it stops. A click will be sensed to confirm proper mating.
8. Attach the ring terminal and black wire to the bare metal surface using stainless-steel self-locking
hardware (i.e., machine screws with washers and locking nuts) or other appropriate hardware to ensure
a reliable terminal-to-metal contact. Tighten securely.
9. Apply an approved paint or rust-inhibitor over the remaining exposed bare metal surface and around
the ring terminal.