12 volt wire loses voltage

I'm getting worried about this, the ign sense should draw next to nothing, place the unit across a 12v  battery and connect the grounds. Then connect this wire to the pos. You should see nothing at the terminal. If you get lots of sparks its faulty, don't use it.

Have you connected your grounds BEFORE you hook up the 12volt positive.  I had a 07 Jeep Patriot (Jeep/Dodge....same thing) that I worked on last thur, and when I hooked the 12 volt positive wire to the ignition wire it was doing some weird things.  Figured it was something with the ground and hooked that up first....then reconnected my ignition wire and sure enough.....no weird stuff!  Make sure your grounds are hooked up first!!!!