Big gun power box issues

I purchased a used big gun exhaust and power box for my 2015 850 sp. the system was off of a ’13 850 xp. When i hook up the programmer and attach the ground (to the neg battery terminal or the frame) it blinks no signal on channel one. This is when the key is off and kill switch is also off.

Big gun power box issues

I purchased a used big gun exhaust and power box for my 2015 850 sp. the system was off of a ’13 850 xp. When i hook up the programmer and attach the ground (to the neg battery terminal or the frame) it blinks no signal on channel one. This is when the key is off and kill switch is also off.