Originally Posted by Rusty

Look at the upper radiator hose to see if it has been cut and a metal part installed with wires. If nothing there. Look at the heater hose for the same thing. It would be over by the battery box and the throttle body. A rubber hose about 1" in diameter that going into the firewall. If nothing there. The next place would behind the intake manifold. Between it and the firewall on a metal tube. If you still can't find it. Look for new wires going into the firewall. I ran mine through the rubber boot over by the battery, next to the bottom of the windshield. The easiest place to run new wires.