I had the same problem and the traces on the CCU board were burnt up. This is usually caused by the Aux. water pump being locked up in the inside fire wall beneath the battery. Fix the traces with wire or resolder and unhook the water pump plug right next to it and see if it will not work then. I found out the hard way and burnt up TWO CCU before I found out the pump goes trough the CCU. When the pump is fine the board will pull less than 1 amp. When the pump locks up you have smoked the CCU. If the pump is bad replace it and put a 1 amp in line fuse with it and no more fried CCU. Good luck!!!