what i know and whats been done. New 3.0 Dyna coil installed this year ran after install. Sat for 6 plus Had hip replaced wire checked red wire to coil insuring voltage presents 12.3 wire checked blue wire from coil to plug 26 ohm 0L 0.0 yellow lite on BD4121-1D flashes during start attempt red light bellow does not illuminate during start attempt or pwr on. Red light on start module 170-00251 flashes during start attempt. a know good coil and wires were slaved in with no start. No fire to coil Plugs were also changed from a running bike. So which item do i buy the 170-00251 or the BD4121-1D? Or Both?