Diagnostic Aids
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
DTC B3265 06 will also set anytime the 10-amp TRUNK fuse is open. Besides a short to ground on the relay coil voltage supply circuit or the relay switch voltage supply circuit, a short to ground on the rear compartment lid release actuator output circuit can cause the fuse to open.