Replace ACDelco D1482E Trunk Lid Release Switch

Do you know how the system works ? Do you know what a wiring diagram is an how to test electrical circuits with a DVOM - digital volt ohmmeter ? This is how to find the problem .
Circuit/System Description
When the ignition is ON, the body control module (BCM) supplies a signal to the rear compartment lid release switch through the trunk release switch signal circuit. When the rear compartment lid release switch is pressed, the voltage within the signal circuit is pulled low and in response, the BCM applies ground to the trunk release relay control circuit, which energizes the coil side of the trunk relay. The switch side of the trunk relay then closes, supplying battery positive voltage through the relay and the latch motor voltage control circuit to the rear compartment lid latch. The rear compartment lid latch, then releases the rear compartment lid so that it may be manually raised to an open position.
Circuit/System Testing
Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
Test for less than 1 ohm between the ground circuit terminal B and ground.
? If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify the scan tool Trunk Switch parameter is Inactive.
? If not the specified value, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the BCM.
Install a 3A fused jumper wire between the signal circuit terminal A and the ground circuit terminal B. Verify the scan tool Trunk Switch parameter is Active.
? If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
If all circuits test normal, test or replace the rear compartment lid release switch.
Component Testing
Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
Test for infinite resistance between the signal terminal A and the ground terminal B with the switch in the open position.
? If not the specified value, replace the rear compartment lid release switch
Test for less than 2 ohms of between the signal terminal A and the ground terminal B with the switch in the closed position.
? If greater than the specified range, replace the rear compartment lid release switch.
Test for infinite resistance between each terminal and the lid release switch housing/case.
? If not the specified value, replace the rear compartment lid release switch.
hooking up a factory or some other type professional scan tool an checking for DTC'S - diagnostic trouble codes should also be done , could make diagnoses easier .
DTC B2730 (Sedan)

The microswitch for the Volvo S40 trunk lid is located inside the trunk lid panel. On the left side of the trunk lid panel, you should be able to locate the access panel for the microswitch. Remove the panel to access the switch. Disconnect the electrical connector from the switch and remove the mounting screws to remove the microswitch. Install the replacement switch by tightening the mounting screws and reattaching the electrical connector. Test the switch to make sure it works correctly and then reinstall the access panel.

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.

The rear compartment lid release system consists of the following components:
• Body control module (BCM)
• Folding top cover actuator
• GMLAN serial data link
• Keyless entry transmitter
• Rear compartment lid ajar switch
• Rear compartment lid release actuator
• Rear compartment lid release switch
• Remote control door lock receiver (RCDLR)
• Trunk fuses
• Trunk release relay

Rear Compartment Lid Release System Operation
The rear compartment lid can be released by operating the rear compartment lid release switch or pressing the rear compartment lid release button on the keyless entry transmitter. When the rear compartment lid release switch is operated, the rear compartment lid release switch signal circuit to the body control module (BCM) is switched to ground. The BCM receives the rear compartment lid release switch input and applies ground to the trunk release relay control circuit. This energizes the trunk release relay coil, closing the switch side contacts, allowing battery voltage to be applied to the rear compartment lid release actuator and folding top cover actuator, releasing the buttresses and opening the rear compartment lid. Ground for the rear compartment lid release switch is provided at G300. The rear compartment lid ajar switch, rear compartment lid release actuator, and folding top cover actuator are provided ground at G301. The rear compartment lid will not release until the vehicle speed is zero and in park.

Do you know what DTC'S - diagnostic trouble codes are ?
DTC B3265 01 : Trunk Relay Output Short to Battery
DTC B3265 06 : Trunk Relay Output Short to Ground or Open

Do you know what a relay is an how it works ? TRUNK release relay located in the underhood fuse / relay box.
VEHICLE RELAYS Operation Diagnosis

Hi Jeff,
I was going to say, check fuse/ jump the load side of relay Good post.

Hello James Squyres,

Of the 33 TSBs (tech service bulletins)...

I found nothin on your issue...

Going to the vehicle drawings... (I'm guessing you are considering keeping this beauty)...

Get the FACTORY+WORKSOP+MANUAL... I HIGHLY
recommend for drawing (exactly this issue) and easy secrets to get through those nasty UNIQUE Caddy tasks.. that NO body but your friendly CADDILAC Club might ALSO know...

Nevertheless...
your drawings are presently available on one of my favorite sites "BBB Industries: (see below, registration required).

Perusing the drawings...
The only source not shared with your manual ignition source appears to be through your "TRUNK RELEASE" function.. is sourced (without the ignition) through "THE TRUNK LID LATCH SWITCH"... (ground source).

I am thinking LATCHED (totally defective, replace) contacts there would cause your problem...

BUT... on further consideration...

The drawing show a total TRAVEL of the un-latched lock should completely open the ground circuit... reversing POLARITY of the motor and ready it for the LATCHING sequence...

To me...

It looks to be the trunk lock TRUNK-LID PULL DOWN MOTOR STRIKER SWITCHES... failing to release (change polarity) in the UP position...

Replace the "TRUNK-LID ADJAR" switch.
Everything SHOULD come up peaches...

As to why it is not an issue with manual control...
I'd need to be there with a Volt-Ohm Meter

(perhaps we could dialog)...

Happy hunting...

8/11/2016... post week-long silence

So... 9 DAYs later

little more dialog is not acceptable (?)
I'll go to my monolog:

If you don't know how to run a Volt-Ohm Meter
I'm wasting your time (GOOD DIGITAL $10).

Because of the POLARITY REVERSAL (to push the latch up (when radio-released))...
IS A GROND START SEQUENCE..!!

It is not reasonable to look beyond the mechanical contacts (which I ALREADY) noted... previously.

The full open motion
(at the end of the open cycle)...
Should push the contacts (to reverse polarity)... STOPPING THE UPWARD DIRECTION...
The battery contact (close sequence) is a BATTERY START SEQUENCE) is triggered by gentle push of the trunk lid into the LATCH.

It the travels down tightening the trunk-lid into place... and reversing the MOTOR POLARITY again at the FULL CLOSED POSITION

The ONLY thing that can keep the motor running is bad contact in the release switch... or (somebody) HAYWIRED it.

It would HAVE BEEN be nice to know if you UNDERSTAND the electro-mechanical nature of your lock assembly.

HAVE you done any rewiring (HAYWIRING) would be the PRIME CONCERN...

ELSE... It is the trunk latch contacts.

When last I looked ... those parts were still available...

and having spare parts for a collector quality car cannot be that DISTASTFUL...

I'd give it a TRY (I'm just saying)

BBB Industries Premium Alternators Starters Power Steering Products

http://www.rockauto.com/en/catalog/cadillac,1995,deville,4.6l+v8,1025323,electrical-switch+&+relay,trunk+lid+release+switch,4828

1995 CADILLAC DEVILLE 4 6L V8 Trunk Open Warning Switch RockAuto

More Information for STANDARD MOTOR PRODUCTS DS939

More Information for ACDELCO 16889150

When the rear compartment lid release switch is pushed, the rear compartment lid release signal circuit to the body control module (BCM) is grounded. BCM then grounds the coil side of the trunk release relay through the trunk release relay control circuit. With this voltage is applied to the rear compartment lid release actuator, opening the rear compartment.
Rear Compartment Lid Release Relay

1. Ignition OFF, disconnect the trunk relay.
2. Test for 65-90 ohms of resistance between terminals 85 and 86.
?‡'
If the resistance is not within the specified range, replace the trunk relay.

3. Test for infinite resistance between the following terminals:
?€¢
30 and 86



?€¢
30 and 87



?€¢
30 and 85



?€¢
85 and 87



?‡'
If less than infinite resistance, replace the relay.


4. Install a 10-amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Measure for less than 2 ohms of resistance between terminals 30 and 87.

?‡'
If greater than 2 ohms, replace the relay.

Rear Compartment Lid Release Relay Malfunction

1. Ignition OFF, disconnect the trunk relay.
2. Verify that a test lamp illuminates between the coil side B+ circuit of the trunk relay and ground.
?‡'
If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the voltage control circuit for a short to ground. If the circuit tests normal, test or replace the trunk relay.

3. Verify that a test lamp illuminates between the switch side B+ circuit of the trunk relay and ground.
?‡'
If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

4. Disconnect the harness connector at the rear compartment lid latch.
5. Ignition OFF, test for less than 5 ohm of resistance between the rear compartment lid latch ground circuit and ground.
?‡'
If greater than the specifed range, test the ground circuit for an open/high resistance.

6. Connect a test lamp between the trunk release relay control circuit and the coil side B+ circuit of the trunk relay.
7. Command the trunk release solenoid ON and OFF with a scan tool.
?‡'
If the test lamp remains ON all the time, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.



?‡'
If the test lamp remains OFF all the time, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.


8. Connect the harness connector at the rear compartment lid latch.
9. Connect a 3-amp fused jumper wire between the switch side B+ circuit of the trunk relay and the voltage control circuit of the lid latch. Verify that the lid latch activates.
?‡'
If the lid latch does not activate, test the control circuit for an open/high resistance. If the circuit tests normal, test or replace the rear compartment lid latch.

10. If all circuits test normal, test or replace the trunk relay.

Component Testing
Rear Compartment Lid Release Switch

1. Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
2. Test for infinite resistance between the trunk release switch supply voltage and ground terminals with the switch in the open position.
?‡'
If less than infinite resistance, replace the rear compartment lid release switch.

3. Test for less than 2 ohms of resistance between the trunk release switch supply voltage and ground terminals with the switch in the closed position.
?‡'
If greater than 2 ohms, replace the rear compartment lid release switch.

4. Test for infinite resistance between each terminal and the lid release switch housing/case.

?‡'
If less than infinite resistance, replace the rear compartment lid release switch.

Could be the relay , could be the switch , could be a problem with the BCM !

Replace thr pulldown switch .

look for the little motor and make sure the little drive gears are ok and not damage in any way. here is a place that only sells GM parts only and it schram auto & truck parts and the #1-800-292-1032

I will do it in my own way since the wiring is messed up, and when i press close on my Remote, the trunk pops open. I will Harness this problem to benefit me since my remote does not have a trunklid switch. I will route the Motor (that has a piston) wire through the switch relay (located just above the vehicle ID plate area), so that opening the trunk lid is only possible when i keep pressing the trunk open swich (on the trunk lid) while at the same time pressing the close/LOCk button on my remote.