Originally Posted by TamSV

Trial and error - if you find it's not one, then it's the other . You won't do any harm.

If you've still got bulbs in the front just try connecting your LED's. There might still be enough draw to stop the quick flashing. If not there's different ways of sorting it - well documented on here.

I won't go into the merits of fitting these units as you seem to know the score but are you sure your high level exhaust will interfere with the standard indies? If the exhaust is designed for the SV they usually seem to be OK.