No lights/horn on lambretta

[immylam]

Jet 200 starting up ok but no lights or horn, what should I check for other than stator? All lights packed in at same time except rear brake , which doesn't work now, would that be the case with a stator problem?

[RICSPEED]

it really is impossible to diagnose electrical faults on line ....but we can give you a few pointers but it all comes down to how well you know you way around a wiring diagram

first step ...check earth and stop light switch

[byron]

are the bulbs blown ?
check earth on regulator unit
get a meter
plug the lighting circuit into a battery, to check the circuits and eliminate any stator issues

[newmanlammy]

Exactly the same happened to my gp last week, tracked fault straight away to stator plate by checking for circuit between brown and white wire coming out of stator using a multi meter. I had no circuti so stripped out stator and found a wire broken that should have linked three coils together, soldered it up and hey presto like new again. As a comparison to yours I got a resisitance on this circuit of 0.6 ohms.