Matt, the test you carried out established your relay, motor and stalk switch are working fine. As you ascertained there is a discontinuity of power to the impulse switch attached to the motor (see pics). The impulse switch contains a resistor and capacitor and these might be faulty but there is a previous check you can do to ascertain whether the impulse switch is faulty or electrical connector. The male plug you tested can be removed by way of just two screws and then you can check whether the solder to pin 5 has perished or disconnected from the wire. If the wires are well soldered then you will need to remove the motor and replace the impulse switch. I hope this helps.

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Deltacom ~ Absit Iniuria Verbis ~