GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Regal 🢒 Engine 🢒 Engine Electrical 🢒 Starting and Charging Schematics
Figure 1:

Starting
Object Number: 835353 Size: FS
Master Electrical Component List
Starting System Description and Operation
Charging
Fuse Block-Underhood B+ Buss
Fuse Block-I/P Turn Signals,Corn Lps,Air Bag,Cluster,PCM,BCM U/H Relay Fuses,Fuse Block-U/H Crank, IGN Main Relays
Fuse Block-Underhood B+ Buss
Fuse Block-Underhood IGN 1 Fuse
Fuse Block-Underhood IGN 1 Fuse
Fuse Block-Underhood IGN 1 Fuse
Fuse Block-Underhood B+ Buss
G100, G113, and G171
Figure 2:

Charging
Object Number: 835355 Size: FS
Master Electrical Component List
Charging System Description and Operation
Starting
Fuse Block-Underhood B+ Buss
Fuse Block-Underhood B+ Buss
Data Link Connector (DLC) Schematics
G100, G113, and G171