Ok, I know... I know, there are a million posts on here that talk about how to check for the engine codes on the Jeeps.... but it aint working, I have a 99' and im trying the ol' "on-off-on-off-on" everyone says, but nothing happens. I can do the 'hold the odo button and watch your dash go crazy' trick, but i cant get my CEL to flash its code, not even the code 55 is showing up. I need help guys, my Jeep is acting up and i need to know whats wrong. Thanks everyone.