Description
The trunk lid release system allows trunk lid to be opened using a remote release switch. Release switch is located in glove box, on instrument panel or on console. On models with Remote Keyless Entry (RKE) systems, trunk can also be opened using RKE transmitter.
Some station wagon models also have a rear window glass release that allows rear window to be opened using remote release switch or RKE system.
Trunk lid release system consists of a release switch, release solenoid, release relay, valet switch (if equipped), connectors and necessary wiring. Wiring harness is routed from switch to trunk lid and solenoid. When switch is pressed, release solenoid coil is energized. Release is pulled back, unlatching trunk lid lock, and lid is opened.
On models with Remote Keyless Entry (RKE), the same action takes place except release solenoid is energized by RKE transmitter. Release solenoid is part of trunk lid on sedan models. Some models with automatic transmission also use a transmission position switch that allows trunk to only be opened with transmission in Park or Neutral. On some manual transmission models, parking brake must be applied before release will operate.
REAR WINDOW GLASS RELEASE
Rear window glass release switch is located in accessory panel in instrument panel or glove box. When switch is pressed, release relay is energized and voltage is applied to release solenoid. Release solenoid then releases glass latch and glass is opened. On models with Remote Keyless Entry (RKE), the same action takes place except RKE transmitter energizes release solenoid. Release solenoid is located at inside center of tailgate. Some models with automatic transmission also use a transmission position switch that allows rear glass to only be opened in Park or Neutral.
TRUNK WILL NOT RELEASE
Check lock and release mechanism for mechanical interference. Check solenoid connectors. Check release relay and circuits. Check park/neutral position switch (A/T) or parking brake switch (M/T) for open. Check Daytime Running Light (DRL) module for open. Check for fuse block open. Check valet and security switch connections. Check system grounds. Check release switch connections.
TRUNK WILL NOT RELEASE WITH IGNITION ON
Check convenience center connections. Check circuit between transmission position switch and convenience center. Check for open in fuse block circuit.
TRUNK RELEASES WHEN VEHICLE NOT IN PARK OR NEUTRAL
Check convenience center connections. Check circuit between transmission position switch and convenience center. Check for open in fuse block circuit.
TRUNK DOES NOT LATCH
Check lock and release mechanism for mechanical interference. Check for short in circuit between security switch and release switch. Check for short in circuit between security switch and solenoid.
REAR GLASS RELEASE INOPERATIVE FROM BOTH SWITCHES
Check for open fuse. Check for short to ground in fuse circuit. Check for open in ground circuit or poor ground. Check for poor connections at transmission switch connector. Check for open in circuit between convenience center and transmission switch. Check isolation diode. Check for open in release relay circuit.
REAR GLASS RELEASE INOPERATIVE FROM TAILGATE REAR GLASS SW
Check for open fuse. Check for open in circuit between tailgate lock sense switch and convenience center. Check for poor connections at push button switch and tailgate lock sense switch.
REAR GLASS WILL NOT LATCH
Check convenience center ground connection. Check for short in circuit between convenience center and glass release solenoid. Check for mechanical interference preventing glass from latching. Check rear glass release relay. Check for short in circuit between accessory switch panel and rear glass switch.
TESTING
Note. On models with Remote Keyless Entry (RKE) systems, see KEYLESS ENTRY SYSTEM - REMOTE article for specific testing of trunk release system.
TRUNK LID DOES NOT OPEN WHEN TRUNK LID RELEASE SWITCH IS
PRESSED, BUT OPENS WHEN REMOTE FUNCTION ACTUATOR TRANSMITTER
TRUNK RELEASE BUTTON IS PRESSED
- Connect scan tool to Data Link Connector (DLC). Press trunk lid release switch. If switch input is not received at Instrument Panel Cluster (IPC), go to next step. If switch input is received at IPC, replace IPC if no codes exist. See appropriate «INSTRUMENT PANEL»(/cadillac/deville-concours/1994-1998/remont/gauges-instrument-panels/#instrument-panel) article.
- Disconnect Driver Information Center (DIC) connector (Seville) or headlight switch connector (Concours and DeVille). Connect test light between ground and connector C1, terminal "J" (Yellow wire - Concours and DeVille) or connector C1, terminal No. 11 (Yellow wire - Seville). If test light comes on, go to next step. If test light does not come on, check for open circuit in Yellow wire. If circuit is okay, replace IPC. See the appropriate «INSTRUMENT PANEL»(/cadillac/deville-concours/1994-1998/remont/gauges-instrument-panels/#instrument-panel) article.
- On Concours and DeVille, connect test light between connector C1, terminal "J" (Yellow wire) and connector C2, terminal "E" (Black wire). On Seville, connector test light between connector terminals No. 11 (Yellow wire) and 15 (Black/White wire).
- If test light comes on, replace headlight switch (Concours and DeVille) or DIC (Seville). If test light does not come on, repair open circuit in Black wire (Concours and DeVille) or Black/White wire (Seville).
TRUNK LID DOES NOT OPEN WHEN EITHER TRUNK LID RELEASE SWITCH
IS PRESSED OR WHEN REMOTE FUNCTION ACTUATOR TRANSMITTER TRUNK
RELEASE BUTTON IS PRESSED
- Connect scan tool to Data Link Connector (DLC). Press trunk release switch or trunk release on remote function actuator transmitter. Switch valet lockout off. If Body Control Module (BCM) commands trunk lid release on, go to next step. If BCM does not command trunk lid release on, check status of valet lockout switch with scan tool. If status indicates OFF, replace BCM. If status does not indicate OFF, check Dark Blue/White wire for a short to ground. If circuit is okay, replace BCM.
- Disconnect trunk lid release relay. Connect test light between ground and relay connector terminals No. 86 (Orange wire) and 30 (Orange wire). If test light comes on at both terminals, go to next step. If test light does not come on at both terminals, repair open circuit in Orange wires.
- Connect test light between relay connector terminals No. 86 (Orange wire) and 85 (Light Blue wire). Press trunk lid release switch or command trunk lid release open with scan tool. If test light comes on, go to next step. If test light does not come on, check Light Blue wire for an open circuit. If Light Blue wire is okay, replace BCM.
- Connect fused jumper wire between relay terminals No. 30 (Orange wire) and 87 (Black/White wire). If trunk lid does not open, go to next step. If trunk lid opens, replace trunk lid release relay.
- Ensure fused jumper wire is still connected. Disconnect trunk lid release solenoid. Connect test light between solenoid terminal "A" (Black/White wire) and ground. If test light comes on, replace trunk lid release solenoid. If test light does not come on, repair open circuit in Black/White wire.
REMOVAL & INSTALLATION
Note. Vehicles are equipped with Supplemental Inflatable Restraint (SIR) system. To disarm system, see AIR BAG RESTRAINT SYSTEM article.
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
Remove switch trim cover or filler panel, if equipped. Gently pry switch mounting assembly from instrument panel or console. Disconnect electrical connector and remove switch. To install, reverse removal procedure.
Open trunk lid. Disconnect electrical connector from release solenoid. Remove solenoid attaching screws. Lift solenoid tab from notch in lock assembly and remove solenoid. To install, reverse removal procedure.
Open rear glass and tailgate. Remove tailgate lock cylinder. Remove release solenoid bumper, if equipped. Disconnect electrical connectors. Loosen nuts on striker locator and move it aside. Remove solenoid attaching nuts and remove solenoid. To install, reverse removal procedure.
