Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Buick >> 2019 >> Regal Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> Hatch Release Malfunction >> Circuit/System Description

Circuit/System Description

For an overview of the component/system, refer to: Rear Hatch/Gate Description and Operation 

Circuit Description
B+ - Relay Switch Supplied from a fuse.
Signal The control module input circuit has an internal resistance connected to 12 V.
Control - Component The output circuit is switched to 12 V to activate the component.
Control - Relay Coil The output circuit is switched to 12 V to activate the component.
Ground - Component Chassis Ground
Ground - Relay Coil Chassis Ground
Component Description
A23C Liftgate Latch Assembly The DC motor unlatches the liftgate. Once the liftgate is unlatched, a switch in the latch will close, grounding the signal circuit to the BCM.
K9 Body Control Module The module controls various vehicle functions like lighting, central door locking, power windows, etc.
S46 Liftgate Handle Switch
  • The switch has a normally open contact.
  • When the switch is activated, the signal circuit to the control module is grounded.
X50A Fuse Block - Underhood The fuse block houses various fuses and relays.
scientia non olet · About Mike's Workshop Manuals