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Chapter 3

Trunnion Installation

3.1

Planning is the key to fast, easy radio installation. Before a hole is drilled or a wire is run, inspect the

vehicle and determine how and where you intend to mount the antenna, radio, and accessories. If you

are using any of the optional accessories, obtain them and plan for their installation using the detailed

instructions included with each accessory. Plan wire and cable runs to provide maximum protection

from pinching, crushing, and overheating.

The mounting trunnion allows the radio to be mounted to a variety of surfaces.

1. Ensure the surface can support the weight of the radio.

2. Although the mounting trunnion can be mounted to a plastic dashboard, it is recommended that

the mounting screws be located so they penetrate the supporting metal frame of the dashboard.

The locking bracket (RLN4779) is NOT recommended for overhead mounting

CAUTION:

applications.

3.2

1. Select either the transmission hump or an open underneath portion of the dash to mount your

radio. (See Figure 3-1.) When mounting the trunnion on the transmission hump, be careful that

the transmission housing is not affected.

2. Use the trunnion mounting bracket as a template to mark the hole positions on the mounting

surface. Use the innermost three holes for a curved mounting surface, such as the transmission

hump, and the four outermost holes for a flat surface such as under the dash.

3. Center-punch the spots you marked and use a 5/32-inch (4 mm) bit to drill a hole at each location.

4. Secure the trunnion mounting bracket to the mounting surface with the four self-tapping screws

provided. (See Figure 3-1.)

5. Attach the radio to the trunnion mounting bracket using two thumbscrews (Figure 3-2.)

6. If using a Locking Trunnion, lock the radio into the mounting bracket by closing the locking bracket

and locking the cage using the key provided (Figure 3-3.)