Assistance with '73 Femsatronic Rally 200 wiring please

[storkfoot]

History - standard 6v Femsatronic with battery and cut out switch and prior to loom burning out this summer (short from battery) Ignition circuit and lights worked well.

What have I done - replaced loom with a Beedspeed one (see wiring diagram above), brake switch, light switch, front bulb holder and rear light (the switches were original but were showing signs of falling apart).

What is the problem> - ignition circuit, parking light, headlights, brake light all work as they should BUT I can't stop the tail light and the light on the headset that illuminates the green gem, from being permanently on. To my untrained eye, my wiring seems to be in keeping with the Beedspeed diagram.

Common sense tells me that the issue lies on the circuits I have highlighted in green ie. the grey from the tail light all the way to the light switch where it connects to the yellow which then goes to the "green gem" light where, I presume, it earths through the headset. It then goes to the speedo light.

Am I on the right track or should I be looking at the lighting coil on the stator or the regulator (is it? the box by the battery anyway).

[coaster]

You have my sympathies Paul, that wiring diagram is not very clear. Is it possible to separate the wire where they connect at terminal 3 on the light switch? just wondering if there is a back feed involved somehow??

Is the old loom still intact enough to use for comparison purposes and the same with the old light switch?

Either way, testing in the comfort of your garage has got to be better than beside a Dutch road in the drizzle

[storkfoot]

Yes, Col, I can separate the grey and the yellow at "3" in the switch. Are you thinking to just connect the grey and see what happens and then do the same with the yellow?

The old loom is in a bit of a state but, yes, I still have it. There are differences to the new loom but I can't recall what they are at the moment. I shall have a look during the week.

The replacement light switch is the same as the old one and it is wired the same way as the colours are the same. I checked this today.

Cheers

[coaster]

Yes, Col, I can separate the grey and the yellow at "3" in the switch. Are you thinking to just connect the grey and see what happens and then do the same with the yellow?

Yes, that is what I was thinking, just isolating different sections. Just to be clear, are you saying that the rear/telltale/headlamp bulbs all stay on with the engine not running? do all the lights normally work off DC or AC or is it just the brake light fed from the battery? The reason behind the last question is I'm wondering if a crossed wire between the rear light and the brake light could be causing it. You might need to disconnect a lot of connectors checking as you go until the problem goes away. Someone must have a better wiring diagram that that though

[storkfoot]

Only lights that stay on are tail and the one illuminating the green gem in headset. Battery powers horn, parking light, tail light and brake light with engine off. It doesn't power headlight unit.

[storkfoot]

Many thanks to Paddy for sending me some other wiring diagrams. However, this one is still the only one I have that is correct. I'll give Beedspeed a call to see if they have a clearer one.

Anyway, I have just spent an hour or so checking stuff but I'm not really any further on:

The new loom is the same as the old one.
The new switch is wired the same way as the old one.
If I disconnect the grey at "3" there is still a short at the green gem but not at the tail.
If I disconnect the yellow at "3" there is still a short at the tail but not at the green gem.
If I run a dummy wire from "3" all the way to replace the grey at the tail light, I still get the light coming on permanently.

Could it be the earth from the battery? Remember this is the battery that was fried with the loom.

All thoughts gratefully received

[Rs fruitbat]

You have my sympathy , there's nothing worse than elec problems , I have a similar problem with my Vespa pk , it's on its original loom , my indicators don't work and my tail light is on ,but my brake lights don't work , but when I have the headlamp on my brake light and tail light are on , I know I'm of no help but I feel your frustrations

[mick1]

The wiring diagram looks wrong (or parts of).

From the battery there is a Violet wire which is the output from the battery (Yellow is the feed). This goes to the brake light where it turns to brown and feeds the Horn. It doesn't appear to supply feeds for anything else ? As said before it should feed other lights. If this part of the drawing is wrong are other parts ?

[storkfoot]

The wiring diagram looks wrong (or parts of).

From the battery there is a Violet wire which is the output from the battery (Yellow is the feed). This goes to the brake light where it turns to brown and feeds the Horn. It doesn't appear to supply feeds for anything else ? As said before it should feed other lights. If this part of the drawing is wrong are other parts ?

Thanks for that. l'll check the old loom again but I think that was the way it was wired previously.

I also can't obviously see how point "3" in the switch receives its feed unless it's in the switch and unseen to the eye.

I haven't had a chance to look any further into it and I haven't yet phoned Beedspeed. I'll try and find the time tomorrow.

I am conscious that this loom took a battering in getting it through the frame and, even then, I had to cut and shut it. So, I am almost resigned to at the very least taking the tank out.

[storkfoot]

Many thanks (yet again) to Kev for pointing me in the right direction. This is the old switch:



On the left, you can see that in the middle rocker position, the contacts separate. On the new switch this didn't happen therefore keeping the tail light on all the time. Now sorted