Circuit/System Description
WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) controls the park lamp relay to ground the control circuit on the park lamp relay when the headlamp switch portion of the turn signal multifunction switch is turned to the PARK or the HEAD position. This energizes the park lamp relay, illuminating the park lamps. The park lamp relay is directly soldered to the underhood fuseblock circuit board. The replacement of the underhood fuseblock needs to be done to replace the park lamp relay.