Brake Light completely out By mefisto666 (Read 727 times)

[mefisto666]

HI all,

I posted this some time ago but had to stop because of some complications.

Basically, I have a Znen model ZN150T-E and the brake light does not turn on at all. The scooter does turn on with the lever squeezed in. Attached is a ghetto image I created after following the cables. At this point all I can settle for re-wiring so at least have the light is on when the scooter is running, getting brighter I can live without. I also tested the cables at random spots, and the light bulb never turned on. it feels as if there is no electricity running through.

here's a link to the actual electrical map:

encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSYJbFC039HutTBg2vxFP4uIYOYWgYVSB4f1BskDDnz003Fuyj64w

any help is greatly appreciated.

Attachments:

[JR]

Ok you've gave some good information and since the scooter will start with the brake lever pressed that is a good thing. But it seems you are asking about two thing? Brake light and tail light? Your diagram is right , black from the fuse box = 12Vdc and splits and goes to both brake lever switches and then when the brake is pressed you send 12Vdc down the green/yellow wire to the solenoid relay and the brake lights at the same time.

Since the scooter will start with the brake lever pressed we know we are sending this voltage down trhe green yellow to at least the starter relay.

I would check all the plugs connection in the rear and for sure trace out the ground wires. Remember the brake and tail light bulb share the ground wire and if it is bad or not connected well then both brake and tail lights will not work.

JR

[mefisto666]

In most cases, yes the tail and brake light are separated. In my case, there is only one light bulb with two different color glasses that use one light bulb to simulate both lights.

Is there a way to ground the light bulb via a different method in order to 100% say it is the ground wire?

[alleyoop]

No, your brake lights and tail(running lights) are 1 bulb 1157s just like a car. The bulb has 2 filaments. You will have 3 wires going to the sockets, 1 BROWN running lights 1 YELLOW and GREEN STOP LIGHTS and 1 GREEN ground.

To check the ground Get a piece of wire and Hook it up like the GREEN wire is currently on there and then ground the other end of the wire to the frame or any metal piece a bolt around or whatever
Alleyoop

Get yourself a 12V probe light tester they are a few bucks and then probe the BROWN WIRE and the YELLOW and GREEN WIRE right by the SOCKET and see it they have JUICE. Of course the Yellow and green will only get juice when you squeeze the brakes.

[mefisto666]

I did as suggested above and connected a cable to the ground part of the battery and connected it to the ground part of the light bulb and it worked. Problem is, light doesn't get brighter when I squeeze either of the brake levers.

[rogerbernard3]

make sure your light is fully connected.. i had the same issue and the problem was the connection was too loose.. i just bypassed it and used new single connectors..or you can get a new harness but it may be your connection..