Well I finally after a week have thrown in the towel! Going to mechanic with this one! Speed o is dead, BUT if you hook it direct yo battery it's alive! This Heart EHC is 14 months old. My mechanic installed it. Ricky does fantastic work. He has had it a day now and is pretty sure the EHC is failing with a short. But doing some more diagnostics today. I have helped install 3-4 RIP's those were much easier than this one! On the BB&B ride the speedo just died. I have a seperate tach so it did not mess with it. My 1st thought then was it has a short!