I'm bringing back an old thread because I have the same problem on a 1999 Deville. I just did some trouble shooting, and some reading in the FSM. Here is the trouble-shooting section from the FSM:
Quote:
Rear Release Inoperative with Transmitter
---- ------- ----------- ---- -----------
1) Did you perform the Remote Keyless Entry System Check?
Yes -- Go to Step 2
No --- Go to Diagnostic System Check - Remote Keyless Entry
2) Inspect the rear compartment release function by using the
rear compartment release switch on the instrument panel.
Does the rear compartment release function properly?
Yes -- Go to Step 3
No --- Go to Rear Compartment Lid Release System Check
in Body Rear End
3) Is the rear compartment release function inoperative from
both transmitters?
Yes -- Go to Step 5
No --- Go to Step 4
4) Replace the transmitter. Refer to Transmitter Replacement.
5) Replace the remote function actuator (RFA) module.
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My trunk release does NOT work from the remote, or from the dash. The fuel door DOES open from the remote and from the dash. Therefore, I am looking at "Rear Compartment Lid Release System Check in Body Rear End." Following is all the information I can find:
Quote:
Rear Compartment Lid Relase Operation
The lock release of the rear compartment lid allows the unlocking of the lid from the inside of the vehicle by a switch located in the passenger compartment or from the outside of the vehicle by the oval key.
The lock release of the rear compartment lid consists of an actuator and a single wire harness. The harness extends from the switch to the rear compartment lid. The harness connects to the release actuator mechanism.
Pressing the switch energizes the release actuator coil. The release pulls backward and unlatches the rear compartment lid lock. The lid then raises, allowing the manual raising of the lid to the full open position.
An internal circuit breaker protects the entire actuator assembly against overheating and internal shorts.
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Rear Compartment Lid Release Circuit Description
Pressing the rear compartment lid release switch provides an input signal to the instrument cluster. The instrument cluster sends a Class 2 serial data message to the body control module (PZM). The PZM grounds connector C6 of the rear compartment lid release solenoid through CKT 1344 (LT BLU) if the following conditions are present:
• The transaxle is in the PARK position.
• The valet lockout switch is closed.
Power is supplied through the following components to the now-grounded CKT 1344 (LT BLU):
• The RADIO/PHONE fuse
• CKT 40
• The coil of the rear compartment lid release relay
The relay coil energizes and closes the relay contacts.
Power is supplied from the CONVENIENCE fuse through the following components:
• CKT 2040 (ORN)
• The now-closed relay contacts
• CKT 56 (BLK/WHT)
• The rear compartment lid release solenoid
The solenoid energizes and the rear compartment lid latch assembly releases the rear compartment lid.
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Sounds like I have to check for the LT BLU (light blue wire?) at the solenoid to go from non-grounded to grounded when I hit the remote to open the trunk lid.
Does this sound right?
