" to test the other circuit. while the bike is running and in gear lever pulled drop the side stand. if nothing happens the other circuit is working. however if the bike stops when the sand goes down even if the lever is pulled the second circuit is faulty. "
Dont know what you mean by second curcuit but will google for it.
the safety switches are in a circuit that works with a combination of on and off's depending on which switch is deployed or not.
the neutral light is part of the circuit. when it's on. [in neutral] all the other switches are ignored and so mute. only when it's off do the others actually do something.
the side stand switch is a simple on/off switch to let the system know when the stand is down.
the clutch switch however is a two way switch [with 3 wires] it is never off [except in neutral] when the lever is pulled it operates one circuit when the lever is released it operates a different circuit.
depending on what position the other switches are in will determine what the bike does.
assuming the bike is in gear. the starter will not operate with the clutch out. this is to stop you starting it in gear, [one circuit] but if the clutch lever is pulled. it will let the starter operate. [other circuit] this is so you can restart the bike if stalled without the need to put it back into neutral.
this switch also works in conjunction with the side stand switch. if the stand is up either position of the clutch switch, will make no difference. [normal riding] but if the bikes in gear and the stand is down releasing the clutch cuts off the engine. this is to prevent you riding off with the stand down.
you can test this as I stated. you can also test the circuits while riding [not recommended
unless your on a quite road.
start the bike as normal set off slowly in first gear when you reach 10mph move the side stand switch with your toe the bike will cut out. while rolling press the starter. nothing should happen. then pull the clutch the bike will now restart.