Motor Speed Controller Causing Relay to Lose Voltage and Stop Working
I think this will do what you want. You will need an additional relay or a 3-pole relay. I showed a diode across the speed control output, but that may already be in the speed control. I also showed an on/off switch. This is similar to the circuit offered for the other question, but I showed an additional relay instead of a 3-pole relay. I hope it is easier to understand the way I drew it.