K 2500 Truck 4WD V8-393 6.5L DSL Turbo (1992)
Trunk / Liftgate Lock: Description and Operation
Voltage to the Rear Window Release system is available at all times through the CTSY Fuse and the ORN (40) wire. Ground for the Rear Window
Release Control Relay is provided through the TAN/WHT (33) wire and the Park Brake Warning Switch on manual transmissions or the ORN/BLK
(434) wire and the Park/Neutral Switch on automatic transmissions.
These switches are closed to ground with the Parking Brake set or the transmission in PARK or NEUTRAL. Closing the Rear Window Release
Switch allows current to flow through the switch and the BRN (1146) wire to the Rear Window Release Control Relay.
The Relay is energized and current flows through the relay contacts and the DK GRN (1148) wire to energize the Rear Window Release Solenoid,
which grounds through the BLK (150) wire at G400 and releases the Rear Window Latch.
