2006 Ford Explorer, alarm

I have a 06 Ford Explorer, when I test the voltage on the power lock (gray yellow)  it reads postivie at rest and almost ground when you push lock.  then on hte power unlock (PURPLE / gray) I get ground at rest and postive when I press the unlock button.  The output from my alarm HT-800 is negative.  Notsure whichdoor lock system I have.  I thought it was positive but it seems to be positive and negative.  How do I set this up.  I have tried to convert the voltage using a relay but it did not work unless I did something wrong.

Should be NEG(-) trigger.

Kar TuneMan,

I hook them up and all that happens is the doors lock but dont unlock. Do you think that it may just be the alarm?  And the voltager on the unlock is negative, but the lock is postive, does that sound right. 

Sounds like you have the wrong violet/gray. It should show a positive at rest, ground to activate....

And make sure you are using the alarm outputs to trigger relays....

I just brought some diodes, but I need relays too?

Okay, that worked for the moment.

The problem that happens now is that since the factory keyless entry turns on the int and ext lights on unlock and on exit it turns them off.  I guess the alarm is seeing the delay in the turn out as a problems and sounds the alarm.  It also is not letting lock or unlock the doors once the lights go off.  Is there a fix to this? Is there anyway to make the aftermarket alarm do the same thing as the factory one, meaning upon ulock the lights come on and lock the go out.