novak hv maxx propblem
just bought a novak hv maxx 4.5 system, used off ebay,got it all set up, just like the manual says,when i plug my batterys in the streering works fine but the throttle ,sometimes it works, sometimes it doesnt,when i give it full throttle the blue and green light are on,sometimes it only works in reverse,any ideaS ON WHAT THE PROBLEM might,thanks