Curtis 1268 Controller Wiring Diagram. Parameter min max default value 39 m2 brake min 10 100 10 40 m2 brake max 10 100 100 41 m2 brake map 20 80 22 42 m2 brake start 0 40 5 43 m2 brake end 0 40 14.2 44 overvoltage 40 65 62 45 low voltage 27 42 37.5 46 throttle map 20 80 20 47 throttle 0% 0 2 0.5 48 throttle 100% 2.1 5 4.5 With this sort of an illustrative manual, you’ll be able to troubleshoot.

Controller powering up isn't to do with your 12v side. Each part should be set and linked to different parts in particular manner. Thats a separate power circuit.