Hi. New here ,I just bought a tach speedo combo ,watched the videos and even read the instructions. So I take the seat off and plug the unit to the adapter they sent and plugged that into the port on the bike and nothing it is supposed to calibrate when I turn on the ignition. So I hook it up to the dash and it works but say no cal. Any ideas except returning it. My bike is an 07 roadking and the part says its for my bike.

 

Might be better off posting this over in the electrical tech section: https://www.hdforums.com/forum/elect...ting-alarm-43/