New Controller Brake lights wiring

Joined
Mar 18, 2025
Messages
2
Location
Norman, Oklahoma
Hello, I’m giving in and pleading for some confirmation on wiring so I don’t blow out another display. I have a GoTrax Flex, for which I have replaced a faulty controller, and at the same time upgraded the throttle to a key-start LCD and throttle.

Everything works as expected after some splicing, but I’d like input on the lighting situation. There doesn’t seem to be a GoTrax wiring chart anywhere for the Flex scooter and I currently have no brake or head light and I’m not sure which connection to make. All other features work perfectly.

My controller:

IMG_6384.jpeg
The wiring diagram for the motor controller:
IMG_6387.jpeg
IMG_6388.jpeg

Here is the four-wire connection to the brake light/tail light:
IMG_6390.jpeg

Here is what I have left over on the controller:
IMG_6389.jpeg
I can discard the greens.
Since that controller’s gray is marked as electronic brakes signal, I can assume it goes with either the green or yellow wire on the GOTRAX tail light, but which one? And what about my leftover wire that doesn’t get used (green or yellow on the bike)?


Finally, the headlight?
There’s no control on the LCD to operate a light so I may have to insert a switch, but where can I power it?
IMG_6391.jpeg
Any help here would be greatly appreciated. Thanks in advance.
-Daniel
 
Last edited:
Hi,
The Controller have no Lightports.
for Example, S866 Displays will have a switchable Lightport.
You can use the AUX-Port from your Controller (yellow/black) with Stepdown
and external Switch for Front and Tailligt...there was no Option for Brakelights...
Regards
 
I didn’t even consider that possibility, so it’s lights or nothing…guess I’ll need to find another solution out on the street, eventually 🙄

Thanks for the quick reply, much appreciated!
 
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