[old 75 owner]

Does anyone have a picture showing the location of the starter / gearbox inhibitor switch. It looks like the picture, but I need to know where it is or how to test it.

 

[old 75 owner]

In answer to my own question, it is under the airbox, on top of the gearbox. The wiring goes into the main loom below the airbox, I may have rodent chewed wires down there or a dodgy switch, does anyone know how to test the switch?

 

[old 75 owner]

I fixed it. I took it apart, cleaned it, and put it back together and it works fine. Typical poorly designed component, not properly sealed

 

[old 75 owner]

This is what it looks like inside and out

 

[old 75 owner]

The unit is just an electrical switch array with no electronics, just sprung contacts on the underside of the white rotor arm in the first picture. The wires are normally covered with a silicone sealant.

 

[old 75 owner]

After all that, I replaced the switch and it started. Came out today and dead as a dodo. Took the airbox out again, and wiggled some wires and it started. I eventually traced it to the LT side of the solenoid coil - white with a red tracer. There was oxidation on the terminal / connector, so I soldered a new connector on the wire, and it started fine. Hopefully it will start ok from now on!