I'm planning on installing a starter kill switch using Photoman's bypass circuit detailed in this thread (and particularly post #16). http://forum.ih8mud.com/80-series-tech/211786-starter-ignition-circuit-thought.html I'm mostly interested in the starter kill aspect, but the bypass sounds like some decent PM aswell. The reason for the starter kill rather then a sneakier fuel pump kill (or something else), is around here we have mandatory immobilizer's on most models of vehicles. You can't get insurance if you're vehicle is on the list and you don't have one installed. Anyhow, I sure as hell don't want one installed (and don't need one....yet), but want the punk thieves to think I have one. I plan on using an oem toyota switch (can't remember now if it's a fog or rear defrost symbol, but it's the 5 wire switch with a connector the shape in the diagram). As best I can figure from searching and playing around with the pinout, I whipped up a diagram using the switch and a relay. I'll be using a 70a relay with a 50a fuse. I do have a couple of questions after playing with the pinouts and schematic tonight. 1. On the switch, pins 1 and 4 are for the backlight led. It seems to light up with either +12v to 1 and 4 to gnd or +12 to 4 and 1 to gnd. But I thought that led's can only be driven from one direction? .... As I was typing this out, I think I just figured it out. They're not leds and just normal lights. 2. I've seen reference in a couple posts of people carrying bypass jumper wires for the solenoid in the event or some kind of ignition circuit problems. How does this work exactly? From photoman's diagram, I understand it as you would jumper the solenoid straight a 12v source. This should engage the starter. So if the key is in the ON position while the motor is cranking, it should fire up?