Wiper motor, five wires, pulled from an early W111.

Brown wire is ground but that leaves four other wires. Can anyone tell me how to bench test the functions?

The wiring diagram just shows four wires coming off the motor. One is going to the foot pump switch but how do I test the functions of the other three?

When I put 12v to one the motor turns over. When I put 12v to the other three wires I get nothing.