Wiring for 1979 Vespa PXMk1 headset ignition/front headlight

[wink]

Hi All,

I'm just finishing off the restoration of the above and I now need to wire up the headset (with ignition key in the top) to the main loom. I have the three section of wires coming from the switches down to the lower loom and the horn, but can anyone tell me what the correct sequence is for the wiring up into the headset,along with the additional wiring segment (yellow & black wires).

Also can someone advise of the correct routing for the cables and loom coming from the headset to the main frame. ie gear, clutch and throttle cables and their correct placing against the wiring.

Thanks in advance Chris

[sbwnik]

I can never remember precisely which way the cables run, but a rule of thumb is that the clutch and front brake cross the stem to keep the run smooth, while the gears and throttle are self explanatory.

The wiring inside the handlebars should be something like:

Put the key in, and turn to the on position. If you look underneath it, you'll see that two lugs are touching contacts, and two aren't. The two that aren't need the green wire fitting to one side, then an earth wire to the other (When you turn the ignition the other way - to off - it earths the live green wire, killing the engine)

To the headlamp - I'm going from memory here - you have pink, violet, black and another colour I can't remember... Brown maybe? Pink and violet run to the headlamp/dip connectors on the bulb, the brown (??) goes to sidelight, and the black is the earth. This one connects to the pole that links all the other at one end, the handlebars at the other.

I don't remember yellow, maybe it runs to the speedo?

[PX21]

ok just had a look at my 79 mk1 as you look at the head set from the under side with the ignition at the top and the speedo at the bottom ,the green wire is top left and black is bottom right on the ignition switch . the speedo light goes to yellow and the black is fixed to the back of the speedo with a screw . but i have to say im no expert on the electrical side of scooters but hope it helps any way 

[wink]

Thanks for the help all sorted now, a bit of trial an error got me there in the end. The only thing i'm missing now is the bulb holder unit that goes at the bottom of the green warning light on the top of the headset (i've got one but need a second). If anyone has a spare one kicking around I'd gladly take it off your hands !!!! Thanks Chris