5. Radio Wiring and Power Lead Connection Locations

a. Methods to connect radio power on General Motors vehicles is dependent on the vehicle model (See Figure 1 - One Piece Transceiver Installation or Figure 2 - Trunk Mount Transceiver Installation as needed).

Do not connect the negative power lead to any under-dash termination point.

One of the following four methods is suggested:

1. Connect the positive and negative power leads directly to the battery terminals.

GM approved methods of connecting auxiliary wiring include the adapter package illustrated in Figure 4 - Power Cable Battery Connections.

Important:
It is recommended that a fuse be placed in the transceiver negative power lead.

This is to prevent possible transceiver damage in the event the battery to engine block ground lead is inadvertently disconnected.

2. Connect the positive lead to the auxiliary power terminal (usually identified by a red plastic cover in the underhood area).

Connect the negative lead directly to the negative battery terminal.

Important:
See above important statement regarding fusing the negative power lead.

3. Connect the positive lead to the auxiliary power terminal (usually identified by a red plastic cover in the underhood area).

Connect the negative lead to the battery body connection point (usually identified by a short # 10 AWG or larger wire running from the negative battery terminal to the body of the vehicle).

Important:
See above important statement regarding fusing the negative power lead.

4. Connect the positive and negative leads to the Special Equipment Option (SEO) wiring provided for this purpose (if vehicle has this option).

b. For One Piece Transceivers (See Figure 1 - One Piece Transceiver Installation)





When ignition switch control is desired, and no SEO wiring exists, a 12 volt power contactor must be installed in the transceiver positive power lead (See Figure 3 - Power Contactor Wiring).

The contactor (supplied by the installer) should be located near a proper 12 volt feed source.

One lead of the contactor coil should be connected through an appropriate in-line fuse to an available accessory circuit or ignition circuit not powered during engine cranking.

The return lead of the contactor coil must return to a proper fused negative point.

c. Handset or Control Units

1. Any negative power lead from a handset or control unit must return to a properly fused negative connection point.

2. It is preferable that the positive power lead for a handset, or control unit, be connected directly to a properly fused positive power feed point.

If ignition switch control is desired, the handset or control unit positive power lead may be connected through an appropriate in-line fuse to an available accessory circuit (or ignition circuit not powered during engine cranking).

3. It is recommended that the handset or control unit positive and negative power leads be appropriately fused separately from the transceiver positive and negative power leads.

d. Multiple Transceivers or Receivers

If multiple transceivers or receivers are to be installed in the vehicle, power leads to the trunk or under the dash should be connected to covered, insulated terminal strips.

All transceivers or receivers may then have their power leads connected to the insulated terminal strips. This makes a neater installation and reduces the number of wires running to the vehicle underhood area.

Both positive and negative power leads should be fused.