Possibly for solenoid for gliwplugs on preheat. Yanmar engines don't have them. Westerbeke do! Graeme Sent from mobile: please excuse typos etc.! > On 21 Apr 2017, at 14:19, Ted Harrison <tharrison at innovations-plus.com> wrote: > > my ignition switch arrived. > Red wire on battery, two purple wires on ign. > > What is Sol terminal for? > > Ted Harrison