elctrical problem

[philcasino1973]

just finishing rebuild on li125 special ......had all the usual parts 12v electronic etc etc its an non battery ac model
have hooked all wiring up with new loom .....when its running rear light is on all the time even on first position on key also if press brake the light goes out ..everything else is working correctly
if i unplug pink wire from stoplight switch the rear light then works as it should but then no stoplight at all
any ideas lads?
regards
phil

[rosscla]

Faulty brake light switch?

[philcasino1973]

thought that me self at first tried another brand new scootopia one ..still the same .....then put the old original back on ..all giving the same result
tried another rear reflector/bulb holder still the same its getting a feed from somewhere when pink is plugged into switch??????????????????????????
regards
phil

[rosscla]

Do you have one or two pink wires at the switch? If one, the other side needs to be earthed at the switch

If the loom is new is it to original spec Li3 or something else?

What sort of regulator / junction box are you using?

[Meds]

It sounds like you have more than 1 fault.
A common reason for the brake light looking like it isn't working is the rear light has been wired up back to front
Ie brake light circuit is wired up to the back light circuit and vice versa,
The way to check this is take the lens off and watch the lamp filaments light up.
When the back light is on, one filament should be lit
Hit the back brake and both filaments should light.
If this is the case then swap the supplies over in the back light and it should work correctly.
That won't cure you back light being on all the time

If your back light is on all the time it sounds like you have it wired directly into the feed from the stator so re check the wiring of the rear light circuit.

My personal set up when rewiring a scoot is to build up the wiring in stages
Ignition circuits first
Then the horn and brake light
Then the lights

Hope this helps

[philcasino1973]

its a 2 pin brake switch ......the new loom [same as a scootopia one ] has pink and brown wires to switch ...pink from rear lamp [stop] and brown from regulator that goes from switch to front bulb holder/junction at rear of headlamp this is connected with a brown to ign switch and a purple also from ign switch the horn feed [brown ]piggy backs from this .....this seems to be correct with wiring diagrams am baffled as everything else is working fine
phil p.s am using bgm regulator the latest small ones

[Muppet]

check the headlight earth

[philcasino1973]

well lads .......thanks for all your replies and help
have now solved the problem with the help of mr harry barlow from h-bomb scooters who kindly offered to call in on his way home [he lives a mile from me] i have to hold my hands up to say i was testing engine and elecs and hadnt put brake pedal in !!!!!!!!!!!!!!!!!!!!!!!!! consequently the light that was on was the brake light and working as it should think i need to go and lie down
regards
phil

[rosscla]

So the fault was that there was nothing to press the switch, priceless.

Glad you got it sorted.

[philcasino1973]

So the fault was that there was nothing to press the switch, priceless.

Glad you got it sorted.

yes switch was in and wired but no pedal to depress it
feel a bit of a fool now but hey ho am still learning at 62 ..........just didnt dawn on me till harry said its working phil then the penny dropped oh hell
thanks again everyone
phil