stuart,
if i knew how to put in some photos it would be easier to explain what i am looking at. i am not very electrically inclined but i will try. at the end of what i think in the resistor is/was two wires. one is still there and went to the brakes, the other(red) was cut very short. i think it was to reduce the voltage? i can email pics to you or anyone who may be familar with this type controller. help!!