GM Service Manual Online
For 1990-2009 cars only

Scan Tool Output Controls for HUMMER H3 2007

Body Control Module (BCM)

Scan Tool Output Control

Additional Menu Selections

Description

Body Control Module

Rear Defogger Relay

The body control module (BCM) actuates the Rear Defogger relay when ON is selected. The rear window defogger grid should become warm.