I just built a flatbed for my 96 powerstroke. I have led lights in it. I saw a thread a while ago about this but can't find it again. Once I hooked up the led's, the trans cruises in 4th and under throttle kicks into o.d. then back down to 4th. Back and forth. Anyone have any ideas? All the connections are tight and nothing is shorting out. No brake lights on.