Finally got a Whelen CanTrol so I'm hoping to find a "dumb" wiring harness for my Dominator Plus 8. That way I can connect each individual lighthead up to the CanTrol.
I'm more curious where you got the cantrol system. As far as the wiring harness. Try giving Steve at MHQ (EMTanderson on elb) a call. Mhw deals a lot with the cantrols for MSP