GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2002 🢒 Montana Ext. 🢒 Body and Accessories 🢒 Body Control System 🢒 Body Control System Schematics
Figure 1:

Ignition Input, Door Locks and Exterior Lamps Output
Object Number: 685531 Size: FS
Master Electrical Component List
Body Control System Description and Operation
Interior Lights On Request and Horn Control
BATT Main 1, CLUSTER BATT, RR PWR SCKT, PWR LOCK, RAP RELAY, CTSY LAMP, ONSTAR, CIGAR DLC/APO FRT and PWR MIRROR fuses
IGN1, SDM, T/SIG, CRUISE, PCM PASSKEY/CLUSTER fuses
IGN1, SDM, T/SIG, CRUISE, PCM PASSKEY/CLUSTER fuses
IGN Main2, BCM PRGRM, RR WPR/WSHR, MALL/CLUSTER, FRT/WPR/WSHR fuses
IGN Main2, BCM PRGRM, RR WPR/WSHR, MALL/CLUSTER, FRT/WPR/WSHR fuses
IGN Main2, BCM PRGRM, RR WPR/WSHR, MALL/CLUSTER, FRT/WPR/WSHR fuses
Content Theft Deterrent (CTD) System
Door Lock Actuators
G200
BCM, Instrument Cluster and Grounds
Content Theft Deterrent (CTD) System
Seat Belt
Figure 2:

Interior Lights On Request and Horn Control
Object Number: 685536 Size: FS
Master Electrical Component List
Body Control System Description and Operation
Ignition Input, Door Locks and Exterior Lamps Output
Power, Ground, Class 2 Data Line and Gauges
Rear Object Sensor Control Module, Power and Ground
Door Lock Switches
BCM, Headlamp and IP Lamp Dimmer Switch
Keyless Entry
Horns
VSS Figure
Retained Accessory Power (RAP)
BCM and Power
Park Brake Indicator Switch and DRL Ambient Light Sensor
Door Lock Switches
Key Cylinder Switches
Door Locks, Sliding Door Jamb Switches and Liftgate Door Lock
Interior Lamp and Multifunction Switch and Sunshade Lighted Vanity Mirror
Interior Lamp and Multifunction Switch and Sunshade Lighted Vanity Mirror