GPS power (no splice, one bolt, 15min easy job).

[Jazbee]

Read through this old post and thought it was an ideal way to wire up my new Zumo XT to my 2014 Tiger 800 ABS....
All works well with the piggy back at the horn but when I tighten up the ring terminal at the horn mounting bolt the horn stops working 😳 I am getting power for the Zumo and if I remove the earth the horn works again.... not great on auto electrics, anyone have an idea what's going on ?

[awjdthumper]

One side of the horn should be connected to 12V via the ignition switch - that should be the blue/black wire. You shoudl be able to use this connection to the Zumo. The other horn wire is violet/black. I assume the second Zumo connection is to an earth somewhere else on the bike?