LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Computer/Integrating Systems) >> Diagnostic Information and Procedures >> DTC B1433 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) controls the HVAC blower motors through the RUN relay circuit. When the ignition switch is in either the ACC or the ON position, the BCM provides battery negative voltage to the RUN relay control circuit. When the RUN relay is energized, it supplies B+ to the HVAC blower motor switches.

scientia non olet · About LEMON Manuals