No keys seem to function, but if you hold down any button all lights come on.<br/>Travel light is on, coach will level with engine running. <br/>No leaks.<br/>Key switch position makes no difference.<br/><br/>Replaced CPU, KEYPAD, Aux air compressor pressure switch<br/><br/>Tested:<br/>All fuses are OK. <br/>Modular cable is connected.<br/>Ground at cpu is good.<br/>Jumper front and rear solenoids, they click.<br/>Jumper around...