[patrickt]

Craig, you may have 11.7 volts as measured by a VOM on a circuit that is not flowing, but that does not mean there is sufficient capacity to give the load (the motor) the current demand that it needs. That little switch, for instance, could be creating a tremendous amount of resistance and you'd still measure full voltage going through it on a circuit that has no load. Since you know that running wires straight from the battery to the motor works, you know the motor is not the problem. That means there is too much resistance somewhere on the circuit. If you perform a voltage drop test along the circuit, when the motor is trying to run because the circuit is on, then you will find the component that is creating too much resistance. If you Google "automotive voltage drop test" you'll find instructional videos and texts on how to do it. It is not hard at all.