adding sensor to oem ford alarm

Well,, I found the door trigger wire and the hood pin wires. One problem though...  They rest at 0v when door closed, but only rise to 1.2-1.4v when door open, instead of 12v as other have specified. Apparently that circuit runs on lower voltage. I tested all four doors and the hood pin and got the same voltage.

So now I am left with 12v that I need to step down to the 1.2-1.4v of that circuit.  I tried to hook it up with the 12v wire out from the relay, as specified in post #2, and the wire started smoking.

Could anyone tell me how to reduce the voltage I hgave coming out of the relay so I dont ruin the door pin circuit?

I hooked it up just like this ^^^ - except that BLACK/ ltblue wire is the dome light wire, and when I triggered the sensor (keys against glass) all that happened was the dome light lit for 2 seconds. Turning on the dome light even when the alarm is armed doesnt trigger the alarm.

So next i found the door pin wire, which rests at ground and shows +1.25v when door is opened.(tested)   Well, I connected to this wire instead of the BLACK/ ltblue, and what I got when I triggered the sensor was smoking wires, and no alarm. The sensor and relay are wired up as instructed, so that my output when triggered is +12v.

Any other suggestions on how to hook this up would be great, since so far I cant get it to work. I just want the glass break sensor to trigger the factory alarm.

The door pin is switch between "OPEN" and "GROUND" from door closed to door open. 

I dont know, I checked the continuity, and its 1 when open, and 140 when closed.

Check it with a voltage meter - black lead on the suspect door pin wire and red lead on a 12vdc source.

One is close to zero meaning when the door is open the wire is grounded.  140 is still pretty low though - a voltage test should reveal the answer.

it sounds like this means it is negative trigger? Im not sure what this tells me. Well, I tried connecting it directly to the blue neg trigg output of the sensor with no success.  My car has been torn apart for two days and Im fraid I wont figure this out.

The whole 1 and 140 bit, my meter shows 1 with the leads not touching or probing anything, and it shows a number from 0000 to 1000 when probing opposite ends of a single wire, the closer the probes the lower the number.

And as for the voltage test, another clue? with black lead on suspect wire and red to 12vdc -  11.65v door open,  12.91 door closed.

If any of these things sound strange, know that the door ajar/int lights/keyless/oem alarm, everything works as it should and cooperatively as well.