What are Hi and Low brake connectors
- Thread starter RonnieBrowen2106
- Start date
wesnewell
100 GW
On my controller, Brake Hi is electronic braking, and Brake low is regen braking. Electronic braking use battery power to bring the bike to a complete stop with lots of braking power. Regen braking charges the battery but isn't as strong and stops workings at ~5mph.
On most controllers, the low brake and high brake do the same thing. Kills the throttle and activates regen if that is a feature.
The difference is the low brake line gets connected to ground to activate the ebrake function.
The high brake line takes pack voltage to activate the ebrakes.
The high brake is generally used when the bike has brake lights. The brake lever switches are used to turn on the light so can't be used as low brake inputs.
The difference is the low brake line gets connected to ground to activate the ebrake function.
The high brake line takes pack voltage to activate the ebrakes.
The high brake is generally used when the bike has brake lights. The brake lever switches are used to turn on the light so can't be used as low brake inputs.
RonnieBrowen2106
100 W
Ok, thanks for all of your help
What do you mean by "inline"?
Whether you can simply connect the ebrake high-level wire from a controller to a brake light switch depends on how your brake lights work.
If they work by having +12v applied to them by the brake switch signal wire, then yes.
If they work by having ground applied to them by the brake switch signal wire, then no, the controller won't get the right signal--it will be getting 12v all the time, turning the brake on always, except when you actually activate the brakes, when it will turn the ebrake signal off (ground).
Whether you can simply connect the ebrake high-level wire from a controller to a brake light switch depends on how your brake lights work.
If they work by having +12v applied to them by the brake switch signal wire, then yes.
If they work by having ground applied to them by the brake switch signal wire, then no, the controller won't get the right signal--it will be getting 12v all the time, turning the brake on always, except when you actually activate the brakes, when it will turn the ebrake signal off (ground).
Thanks for the info..what I meant by in-line is putting the purple wire into the brake light circuit if you will. It’s a drum front brake with a drum style brake switch. It’s a two wire brake switch. One wire gets 12v the other is a ground. It seems from what I’ve been reading most circuits that use a brake light in the circuit should use the high brake wire but being I have a two wire brake switch this makes me believe it should go to the low side as there is a ground wire in the mix.
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But *where* in the brake light circuit?
And is it being wired in series with it, or in parallel with it? (series means breaking the original connection, and placing the new circuit completely between them; parallel means just connecting one end of the new circuit to the original connection).
You'd have a two wire switch regardless of how it's wired or which way it works.
Doesnt' matter what kind of brake it is. Only matters how your brake light works.
(BTW, if you have a switch with 12v from the battery on one side, and ground on the other, it will just short out your battery when it is turned on, and either damage the wiring, start a fire, pop the fuse, or some other generally bad thing...so your switch must be getting it's 12v from somewhere other than the battery--you should draw yourself a diagram as you trace it out to be sure where that is, so you will know for later, in any troubleshooting, if there is no diagram for the system to start with).
Regarding brake high vs brake low on a controller--most of the brake low stuff I've seen uses the controller 5v internally to pull it up when it's not being grounded. If you connect that to a 12v brake light circuit, you'll probably destroy the controller by feeding 12v into it's 5v power supply and all of the 5v parts everywhere in the system connected to that may also be destroyed (throttle, etc--motor halls might be safe as those are often good up to 20-30v, but not all of them are).
So, how is your *brake light* wired to this switch? That is the thing that you must know for what kind of input your controller will get from it, and thus whether it will work or not.
If your brake light is wired so it always has 12v to it on one side, and one side of the switch to the other, and the other side of the switch to ground, then if you connect the brake light signal to the controller that expects 12v to turn on the ebrake, it will always have the ebrake *on*, *except* when you pull the brake lever, when it will turn *off*. (opposite of what you want)
If your brake light is wired so it always has ground to it on one side, and one side of the switch to the other, and the other side of the switch to 12v, then if you connect the brake light signal to the controller that expects 12v to turn on the ebrake, it will always have the ebrake *off*, *except* when you pull the brake lever, when it will turn *on*. (what you want)
If the controller's brake input expects a ground to turn on the ebrake, then the first example will work, but the second won't.
Thank you so much for clarifying this. Certain things I can grasp rather quickly but for whatever reason this one is running my brain through a loop haha. I don’t think running it in parallel will work as it would always receive 12v as you mentioned. I need the wire to receive 12v when I pull in the lever and turn off the motor power. The brake switch has 12v on one side and the other is a ground. I’ll need to determine which route is best to take. QS just states “
The 12V must out from DC-DC Converter to controller. The 12V engage when you braking.
The controller purple color cable accept DC 12V. Can't high voltage”
Thanks again!
The 12V must out from DC-DC Converter to controller. The 12V engage when you braking.
The controller purple color cable accept DC 12V. Can't high voltage”
Thanks again!
You really should draw up a wiring diagram of your entire brake lighting system, so that you can see how it works--simply knowing what voltage is on each side of the switch doesn't answer how the system is setup, and thus whether or not it will work on your controller.
You need to know which side is being switched, and what it changes to.
If it doesn't change *to 12v* *from ground* then it won't do what you need it to do.
(it's good to have a complete wiring diagram of your whole system anyway, because it lets you troubleshoot problems and repair things much easier than tracing out wires every time you need to do this)