Start by locating the factory harness behind the dashboard on the driver’s side. This model’s color-coding follows a standard automotive pattern: yellow (constant 12V), red (switched 12V), black (ground),.

Start by locating the fuse box under the dashboard on the driver’s side. Remove the cover to access the internal relay panel–pin 30 on the ignition switch feeds power.

Locate the underhood fuse block first–it sits on the driver’s side near the front strut tower. Remove the plastic cover by pressing the two clips on the underside to.

For immediate troubleshooting, locate the constant 12V power supply (typically orange or yellow) connected to the ignition-switched wire (red). Verify connections at the harness behind the factory radio–pinouts follow.

Locate the engine compartment fuse block diagram under the hood driver’s side–pin 30 on the BCM connector C1 handles power windows, while C2 distributes ground signals to the instrument.

Check the fuse first–blown circuit protector F4 (20A) in the under-dash panel causes total blackout. Replace it with an identical rating; generic fuses risk overheating the harness.

Connect the self-exciting charging unit’s output terminal directly to the battery’s positive post using 10-gauge primary wire. Eliminate unnecessary relays or fusible links–this streamlined setup reduces voltage drop by.

Locate the pink wire in the harness–this carries a constant 12V feed for memory functions. Splice it directly to the radio’s yellow lead without relying on fuse taps, as.

Download the official OEM electrical blueprint from GM’s service portal before attempting repairs. The PDF document (part number 24356987) includes color-coded circuit identifiers, fuse block pinouts, and ground locations.

Start by locating the under-dash fuse block on the driver’s side. Pin assignments for the BCM (Body Control Module) are marked directly on the panel: C1 (dark green) handles.