Engine stops when engaging 1st

[Sannox]

It appears to be sorted, I traced back all the wires to a box next to the flasher relay, checked that out with a meter, all ok, but as I went along, I cleaned every contact in all the plugs and sockets, had lunch, went back, put it all together and it worked. So I can't pinpoint the exact reason other than dirty contacts within wiring blocks, now to wash it and shake down ride. Thanks everyone for the suggestions, much apprectiated.