01 Expedition Remote Start

I'm installing a remote start on an Expedition and the truck will attempt to start three times. Each time it cranks a little longer. I think the problem lies with the PATS security system. The wiring info I have says the wire I need to locate to shut off the system to start is green and purple? I've looked everywhere! Any suggestions, am I on the right track? Thanks, Ryan

That vehicle is equipped with the PATS system which means you need a bypass. You can either use a key in the box type bypass or a ford specifc bypass that doesn't require a key. To test this just stick your key in the ignition cylinder (don't turn it) and try to remote start it. If it works, then that's your problem. The green / purple wire your thinking of would be to disarm the factory alarm which is completely unrelated to your problem. Good luck, Mike

now yaknow is correct but also make sure you have the correct tach wire that may also be a problem