Ken, thanks for your response on this ,The reason I wanted to do this is that the pin b24 on the plug that goes into the ECU is faulty and the starter relay will not respond when the start button is pushed, this is the wire that connects to starter relay pin 86.If i understand the wiring to the relay correctly pin 30 Blue/yellow supplies the main power to pins 87 and 87a with switching between them done by pins 85 and 86.The story is, I've got a friend with an 04 Rocket which has had persistant start issues for a long time. 99000miles on it ( push button and click, try again and after a time it fired and ran fine) Last week it woundn't start,not even a click. What i found was that the yellow/ blue wire from the starter relay to pin B24 on the ecu plug was faulty (sometimes making a connection when it was pushed into the terminal block ) . The wire is not broken, it seems the problem is at the connector block where the wire joins the pin in the block .IS it better to repin this connector block ? I have no idea who makes it and it doesn't look too easy to do . When I disconnected the yellow/blue wire from the starter relay terminal block I put a jumper wire in its place and earthed it to the battery - side. the bike started up no problem and the lights switched off and on they should during the cranking and running sequences. so IS IT POSSIBLE just to leave it this way way with the Wire disconnected from the ECU B24. Obviously don't want to damage his ECU.