Since you seemed to be able to measure the current through the motors at high speed, I did the math to tell you how much current you should be drawing through the resistor if the motors are in the circuit or if the circuit goes to ground after the resistor Seventeen amps or 62 amps. So I asked which case do you have?

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician