Car Alarms: adding a shock sensor using only a negitive signal, shock sensor, impact sensor

Question
OK. I bought a Audiovox AS 9492A Shock Sensor. It has 4 wires (Blue, Green, Black, And Red) comming out of it and dosnt define what is what. Can anyone tell me?

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-----Question-----
I have a "Ready Remote Model 23927" car starter/alarm/keyless entry and it has 1 wire for a (-)Negitive signal. Is there a way I can wire a shock sensor to it?
-----Answer-----
Yes, you can.  Just use the negative output from the impact sensor to this wire.

Answer
Black would be ground, Red would be constant +12V

As to the other two, one would be a warn away output the other would be a full trigger.  You will have to install the piece and test the outputs.  Hook it up, mount it, hook your meter up to monitor for negative output, then smack the vehicle, the one that goes to ground with a lighter hit is the warn away output and the one that goes with a harder hit is the full trigger output.  I would use the full trigger negative output to your negative trigger input.  The warn away will not work with your system.