Well my immediate thought would be the starter or alternator. If your getting a fast ticking when trying to start then its probably the alternator. If there is no ticking, its probably the starter. If its not that then its most likely a short circuit, or a bad fuse somewhere in the wiring.
a cable is obviously unplug somewhere. Check cables from the battery to the timing, then timing to the plugs. If every-thing's right, then check cables from ignition.