GM Service Manual Online
For 1990-2009 cars only
Table 1: Blunt Cut Wire Set Information
Table 2: Shielded Wire Set Information

UV8 - Cellular Communication - Circuit Description

CKT 2240 (ORN) receives voltage at all times from the SEO1 fuse. CKT 243 (YEL) receives voltage with the ignition switch in the run and accessory position from the SEO ACCY fuse. Ground is supplied through CKT 1850 (BLK) from splice pack 203 and G203.

    • The cellular phone hookup circuits are located between the driver and passenger front seats extending from a cutout in the carpeting. On a center console equipped vehicle the circuits are located underneath the removable cupholder. An electrical passthrough knockout has been provided on the front wall of the center console storage bin to route the circuits into the bin.
    • The microphone leads are located at the inboard corner of the drivers visor underneath the headliner. Pull down the hanked branch, it should be approximately 208.2-254.0 mm (8-10 in) long, and attach the microphone.
    • The circuits are marked and identified as follows:

Blunt Cut Wire Set Information

CKT #

Color

Description

Comments

243

Yellow

Accessory Power Feed

10A Fuse, 7.0A Capacity

835

Dk Green

Radio Serial Communication

Entertainment & Communication Bus, 1KB

2240

Orange

Battery Feed

15A Fuse, 10.5A Capacity

1850

Black

Ground

15A Capacity

Shielded Wire Set Information

CKT #

Color

Description

654

Bare Conduct or

Microphone Ground & Shield Return

655

Gray

Microphone Signal