Ron, I had chance to check out my 6 motor K-Line E8s to try and determine why the fuse blew. Part of the problem was wires rubbing on the flywheels. Both A units are fairly full with wires for lights, sound and roof fan power. Current running light went from 4.2 amps to 1.6 total while running after securing the wires away from the flywheels. About .6 amps of these 1.6 are used for fans and lights.
Conclusion. Look for something causing a drag on the motors if you are seeing high current draws.