I had exactly the same problem with my Wisper se 905 sport and found there is 4 terminals at the back of the light. I swapped the wires to the other 2 unused terminals. My lights works fine now.
Hi all,
I own a Wisper 905se sport (2010), Carrera mountain bike (set up for the road) and a BMW Strada 650cc so quite easy to say i love 2 wheel transport. Having said that, the Wisper is by far my favourate and used the most :)
Regards, Mark.