LCGB Forums

Trying to help a mate, bought a gp 9mths. ago not really ridden it much, got a problem no headlights or horn have rear light and stop light,he has asked me to help, why I don`t know as me and electrics don`t mix. Here is the setup at some stage it looks like it had a battery fitted.
has a 5 pin reg with 1 red wire from stator and a red & a blue to h/set. they are in the center 3 positions.
has a 5 pos. ign. sw. with 7 wires. orange.brown,yellow. green, pink. blue & black.
Has italian GP type horn dip sw. with red . blue. orange wires
any ideas what to connect to what, as I am pulling my hair out. This sketch may help.

Or this

Have you not got a Brown feed coming up from the Loom this is usually the main Power feed for your Lights and will go with the Brown from your ignition which looks like it has the horn feed joined in with it ?

Also i would earth the headlight block to the headset bottom

There is no Brown feed from loom, from what I can see this is the Red wire top left the Brown wire is from the ign. sw. the Red wire from the loom is connected to a blue from the loom and another blue from the ign. sw.

If you have access to a multimeter you need to find out which colour wire brings the power
Up the the headset from the loom

the red top left and the blue below it

At the moment, your red and blue are going to nothing.
Follow this to get closer:

http://lambrettarestorations.blogspot.c ... -loom.html

The red & blue are connected to the blue from the ignition sw. I`ve left it alone now for a bit, and will be off to modrapheniacs, Sandford for the weekend, and will resume next week. look forward to any suggestions for when I get back !

All sorted, basically it was a combination of 3 faults, worse was, there was a blue wire from the regulator in the place where the brown wire from the ignition switch should have been, this blue wire from the regulator was discarded, the dip/horn switch worked intermittently and was somehow shorting, hardest to find was a faulty connection between the two orange wires in the bulb holder connectors, trouble I found was, thinking I've cured it then finding the lights still didn't work as there was still a fault elsewhere. Relief.