The electronic trunk release buttons on my key and under the dashboard are not functioning. I think the problem is with the trunk release relay itself

It sounds very much like there's an electrical problem with the trunk, top, and lock on your 2007 VW Eos. The following advice may be used to identify the issue and maybe resolve it:

1. Examine the fuses: Start by looking for any blown fuses connected to the lock system, top, or trunk in the fuse box. A schematic indicating which fuses are in charge of these operations should be included in the owner's manual. If any fuses break, replace them with the appropriate amperage-rated fuses.
2. Examine the microswitch and trunk latch: There is a chance that the microswitch, which determines whether the trunk is closed, is broken or the latch itself is defective. If the interior light turns on, that means the switch is functioning. Try physically pushing down on the trunk lid. If not, you may need to have the microswitch or trunk latch replaced.
3. Test the key fob: If you have a spare key fob, use it to see if the issue still exists even after you changed the battery. This may disqualify the key fob as the actual culprit.
4. Inspect the convenience module: This electrical brain regulates and operates lighting, windows, locks, and other devices. Should something be broken, it might be the root of your problems. Regretfully, identifying and fixing the convenience module can be difficult and necessitate expert assistance.
5. Speak with a professional: It's recommended to get advice from a trained mechanic who is experienced with the electrical systems of VW EOS if none of the aforementioned solutions work. With the use of specialist tools and equipment, they are able to identify the precise issue and suggest the best course of action for repair.

Extra advice

Make sure your automobile is parked securely and in a well-lit place before attempting these tips.
Do not hesitate to seek professional assistance if you are uncomfortable performing repairs on your car's electrical system yourself.

Think about looking for online communities or forums dedicated to VW Eos owners. You may be able to locate individuals who have gone through similar struggles and can provide insightful guidance.

The '94 Buick Park Avenue has a power trunk release function. The trunk release actuator receives power from the trunk release relay which is supplied by Fuse 2 (15A) in the Relay Center. It's important to note that the trunk release switch in the glove box must be ON for the trunk release button to work. The vehicle must also be placed into the Park or Neutral positions for the release function to be enabled. If the fuse is OK, there could be an issue with one of the switches, wiring or the trunk latch actuator. You can read about failing trunk latch actuator symptoms here: https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-trunk-latch

Do you know anything about automotive electronic's ? The trunk release is controlled by electronic control modules . Having the vehicle check for DTC'S - diagnostic trouble code's should be the first step in the diagnostic procedure . Then reading how it work's !
Factory service repair info.
Rear Compartment Lid Release System Components
• Body control module (BCM)
• Remote control door lock receiver
• Interior rear compartment lid release switch
• Exterior rear compartment lid release switch
• Rear compartment lid release actuator
• Trunk release relay

Rear Compartment Lid Release Operation
The interior rear compartment lid release switch receives a signal from the driver door switch assembly (DDSA). When the interior rear compartment lid release switch is activated, the signal circuit is pulled to ground. The DDSA interprets this and sends a GMLAN serial data message to the body control module (BCM) requesting the rear compartment lid be released. The BCM responds by applying battery voltage to the trunk release relay control circuit which energizes the TRUNK RELES relay. The trunk release relay is supplied with battery voltage at all times. With the relay coil energized, the relay switch contacts close allowing battery voltage to flow to the rear compartment lid release actuator causing the rear compartment lid to release. The rear compartment lid release actuator is permanently grounded at G402.

The trunk release relay is located in the rear fuse box located under the back seat.

Do you know anything about automotive electrical testing ? how to read a wiring diagram ? How to use a DVOM - digital volt ohm meter ? You can find a free wiring diagram here http://www.bbbind.com/free_tsb.html

The trunk release is controlled by an electronic control moduel .
Trunk Release Relay
Output Controls
The rear integration module grounds the trunk relay when commanded ON. The rear compartment should release.

This vehicle has a very complex body control system of three different computers

The body control system consists of the following 3 modules:
• The Dash Integration Module (DIM)
• The Instrument Panel Module (IPM)
• The Rear Integration Module (RIM)
Each of the 3 body control modules integrate a number of functional systems under the control of a single module. Each module is connected to the Class 2 serial data circuit, many of the control functions are implemented by Class 2 messages.

. Rear Integration Module (RIM)
The various RIM inputs and outputs are described in the corresponding functional areas as indicated on the RIM electrical schematics.
The RIM functions include the following:
• Automatic level control
• CIGAR relay control
• Class 2 communication requiring RIM interaction
• Content theft deterrent
• Fuel door control
• Fuel level sensor input
• Heated seat control
• HVAC blower control
• LK/CYL relay control
• Park brake relay control
• Rear defog relay control
• Rear park assist chime control
• Retained accessory power (RAP) relay control
• Reverse relay control
• Transmission shift inhibit
• Trunk release relay control
• Various controls for the interior lamps


Luggage Compartment Description and Operation (General)
Rear Compartment Lid (trunk) release actuation is controlled by the following components.
• Rear Compartment Lid Release Relay
• Instrument Panel Module (IPM)
• Rear Integration Module (RIM)
• Valet Switch
• Rear Compartment Lid Release Switch
• Rear Compartment Lid Release Actuator
Battery voltage for the coil side of the trunk release relay is supplied through the Valet switch (with the valet switch in the OFF position) by the ALDL fuse located in the Underhood Fuse (Bussed) Block. Battery voltage for the switch side of the trunk release relay is supplied by the Body fuse located in the Rear Fuse (Bussed) Block. When the rear compartment lid release switch is momentarily pressed, it provides a ground circuit for the trunk release signal of the Instrument Panel Module (IPM). When the IPM senses that the switch has been activated, it sends a Serial Data Class 2 message to the Rear Integration Module (RIM). The RIM then provides a path to ground on the F/TNK DR REL relay control circuit. The trunk release relay is then energized, and battery voltage is applied through the switch side contacts of the trunk release relay to the rear compartment lid release actuator. The actuator is connected to ground through a ground splice pack located at the left rear corner of the rear compartment, near the left tail lamp connector.

This is very complex if your not familiar with how Class 2 serial data communications work . When you press that trunk lid release button it sends a low voltage signal to the BCM - body control module. Here is how the factory service info. says how it works .
When the vehicle is in park and the trunk release switch is pressed it grounds the rear compartment lid release switch input in the Body Control Module (BCM). The BCM then sends a Class 2 message to the Remote Function Actuator (RFA). The RFA supplies an internal ground for the coil side of the rear compartment lid release relay activating the relay. The rear compartment lid release actuator receives battery voltage through the 15 A trunk release fuse when the relay closes. Ground is supplied by G400.
Your best bet is to take your vehicle to a dealer or some other qualified repair shop that has a factory scan tool or a professional grade type .
You could check the TRK/REL relay in the rear fuse/ relay box .Because you can't test the class 2 data to the rear integrated module. Fuse Block Rear
Under the left side of the rear passenger compartment seat

There is a relay in the rear fuse block for the trunk release. marked trunk relay #36. It is marked on the under side of the lid. If you knew how they worked you could open it by jumping pin 30 to pin 87 in fuse box. on the side of the relay is a diagram of what pins are what . This system uses an electronic control module called ( the BCM ) body control module .When you push the inside release button , that sends a signal to the BCM ,then the BCM activates the relay opening the trunk . Well that won't help ,you won't believe where the fuse box is ! Fuse Block - Rear
In the rear compartment, behind the left wheel well. You could jump the wire at the BCM that goes to the relay. Can't you pull down one of the rear seats to gain access ?

There are 3 phases to fixing your car's trunk lid release problem.

Phase 1: First check the fuse - once you know that's OK, then proceed to phase 2 (below).
The fuse for the trunk lock is
the bcm (pwr) 15A fuse in the instrument panel fuse box (behind panel at drivers right foot)

Check that fuse, as it is the power supply for the button on the dash that sends power to the actuator in the trunk.

Phase 2: Get the trunk open (without taking it to the dealership).
If you have remote keyless entry to the trunk, you could try that - but with the actuator
dead/dying, it shouldn't work.

Here are a couple of ideas to try to enter trunk while (a) actuator isn't working, and (b) all
valet lockout features (designed to deny valets access to the trunk) are in the "Lock" position:

There is the lock cylinder, which you stated is not functioning - put the key in, and it doesn't
turn. Just to be sure, consider: lubricate key with Graphite lock-type lubricant, and retry.

The trunk has 2 valet safetys...the locking rear seats which require access to the trunk to unlock, and then there is a valet switch in the trunk that locks the button on the dash from working to keep valet parking attendants out of the trunk. That may be in the lock position.

You can try accessing the center area of the fold down rear seat and see if you can unhinge the rear seat from there. Maybe reach in with your hand, or an extension-type tool.

there may be a way to fold the hinge away from the seat back so it can be removed from the hinge and give you access to the safety latch in the trunk and open it that way (white handle in trunk).
The white-handled safety latch release is desiged to prevent accidentally trapping children, and
if you can pull it with your extending-type or grasping-type tool, the trunk will open whether or
not the actuator motor is working.

Phase 3: Replace the Problem part.

Your failed part may be either (1) Trunk Release Relay, or (2) Trunk Lock Release Switch

My Satrun ION manual doesn't cover either of these parts, and the online parts houses, e.g.
http://www.rockauto.com/catalog/x,carcode,1431624,pgname,Electrical-Switch%2B%2526%252338%253B%2BRelay,a,search.yahoo.com%2BSearch%2Bfor%2B2004%2BSATURN
fail to provide instructions. One of those times a mechanic has to t=rely on his/her native
handiness and/or experience.
To identify which of these parts is bad, locae the Trunk Release Relay (call your dealer parts
dept. for helpful tips on finding it), then operate the dashboard trunk release button with your
ear close tothe relay - if it makes a noise, the problem is the Trunk Lock Release Switch in
the trunk lid, otherwise its the relay.

There's a trunk release under the dashboard under the steering wheel. Square yellow button. Once you get it open. WD 40 the lock. Plus, sometimes junk in the trunk will get tangled in the locking mechanics.

if i'm not mistaken... i believe there is a disable switch located around the lock mechanism when you have the boot open... it might have accidentally gotten bumped

I purchased a Chiltons through www.eautorepair.net and looked up the Relay for the trunk release button on the dash. I found the location under the fuse panel under the drivers side and found the relay was not pluged in. I conected the relay and to my dismay the button worked.