DEI 504M Shock Sensor
4 total wires: Red, Yellow, Blue and Green

Can someone please tell me which wires to connect the shock sensor to on the BCM? I have attached my service manual BCM wire diagram. It would make it easier if you could tell me the pin numbers from the PDF.

Thanks in advance.

 

So far I wired:

Blue & Green to pin #50

Red to pin #2

Yellow to pin #82

The shock sensor lights up when armed, but it doesn't trigger the alarm. I also waited 1min before shaking the sensor.

 

I would say that the pin 50 is where you want to hook it up.

You need to do some basic troubleshooting now to figure out why it isn't working.

First, if I were you, I would arm the alarm, wait 60 seconds, and then apply a straight ground (through a small fuse if you choose) to the wire you are tapping in to (pin 50). This should set off the alarm. If it doesn't set off the alarm then your shock sensor isn't going to set off the alarm by output a ground.

If you have an amp meter it would be an excellant idea to actually run the ground through the meter. This will tell you exactly how much current is needed to trigger the alarm. If it is a high current input (like the '03 coupes have) then the shock sensor won't provide enough current to trigger it, and will actually destroy itself trying.

The power and ground arn't near as critical at this stage, as you are more concerned with triggering the alarm. If the rear trunk doesn't work then try one of the rear doors. I would still recomend using an amp meter first though to see what kind of current the door pins use. I believe the shock sensor is capable of around 200mA. Anything past that and it won't last long.

Also, how are you measuring the red wire in pin 50? Are you 100% sure you tapped the right wire? There are typically more then one of each color.

 

I've attached the BCM layout of my car.

I measured PIN 50 and the readings are correct. I connected the blue and green wires from the Shock Sensor.

The Shock Sensor red wire is connected to pin #2

The Shock Sensor Yellow wire is connected to a screw. This triggers the alarm, but this is constantly on.

Example. When my car is started and I move the shock sensor, I get a trunk open warning light.

Which wires need to be changed?

 

Kevin,

Do you know which PIN I need to connect the Yellow and Red shock wires to?

I'm 100% sure about pin50

 

Is this the stock security system of an aftermarket? If stock, why don't you connect it to the hood pin switch?

 

On the '07s the stock hood pin is integrated in to the latch. The wire runs to the IPDM under the hood and this the pin status is transmitter on the can bus line. There is no hood pin wire inside the car like on previous years.

The best bet on this is to tie it in to the trunk pin at the BCM.