Hello Grumpy, I have disassembled the wiring and checked everything the blades switch was the problem the wire 13 was a loop to wire 10 to position M (key) and also to the headlights earth. Cut them all and rewired to the diagram Ran a new violet wire number 13 to the main earth strap and wallah it all works (rotten naughty potty word auto electrician) was a mate who did it for free and didn't want to do it. should have done it myself. Now i have left the square voltage rectifier the so called auto electrician wired in in wire 15 the right way round. the red wire from the Tecumseh has the original diodes in it will that matter with an extra one(the square one) Have just got to tidy up now i rewired a rewired mower correctly. Thank you for your patience and all of your help
