My Dad opened up the power distribution box, to look for any loose wires, because we have a problem with our signal lights, and A/C compressor clutch circuit keeps blowing the fuse. Now the problem, after he took that apart the truck won't start, no wait to start light, no lift pump. I don't think the ecm is getting power, but how would he have caused this? and how can we go about checking where the ecm gets power from to the ecm and find the problem? we need this truck up and running asap. Thanks.