with the battery in and hooked up press your start switch and watch your gauges. they should go up or do something. if they do, its either your d.e.s.s. post or lanyard. you can take it to a deal and they can tell you which it is. if the key just came un-programed its 35$, if you key went bad $45 for new key plus 35 for program. if its the post just get a new one and replace it yourself.