Unknown 3 wire connector

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scootergrisen   1 W

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Unknown 3 wire connector

Post by scootergrisen » Aug 11 2019 7:28pm

I have this connect that i dont think is connected to anything on my electric scooter.

It has a LBMC048122HK2-M6 controller where all the wires goes to.

The connector is at the front of the scooter.

Maybe its for a 3 gear speed selector.

I measure:
black/white - blue/white: 3.15 volt
black/white - yellow/white: 3.27 volt

Can some tell what it might be for?
vga_vax_2019_ledningsnet_6.jpg
vga_vax_2019_ledningsnet_6.jpg (59.22 KiB) Viewed 167 times
Last edited by scootergrisen on Aug 11 2019 10:27pm, edited 1 time in total.

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Matador   10 kW

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Re: Unknown 3 wire connector

Post by Matador » Aug 11 2019 8:19pm

My guess is this is for a PAS cadence sensor, which you probably don't need on an e-Scooter anyways.

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scootergrisen   1 W

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Re: Unknown 3 wire connector

Post by scootergrisen » Aug 11 2019 10:25pm

The connector is at the front of the scooter where the headlight connector etc. is located.

larsb   100 kW

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Re: Unknown 3 wire connector

Post by larsb » Aug 12 2019 12:01am

Maybe this can help:
image.jpeg
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It's from a 72v lingbo, often the wiring is the same between the controllers.
Ride on :D

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scootergrisen   1 W

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Re: Unknown 3 wire connector

Post by scootergrisen » Aug 12 2019 7:18am

It seems to be for selecting speed.
I can make it have lower and higher top speed by shorting the wires.
But i have no idea if i am doing it correctly.
I cant find a electrical diagram of a 3 speed control so i can see how the connections are made.

If i look in HK2 122.pdf for my controller the three wires are called:
low gear input | 3-gear speed control
high gear input (or button input) | 3-gear speed control
GND

Does "(or button input)" mean that it could be a BOOST button for short term extra speed/better acceleration?
It only seems to change the top speed from what i have tested.

larsb   100 kW

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Re: Unknown 3 wire connector

Post by larsb » Aug 12 2019 8:03am

it's normal to have a default setting in program and that the controller switches to low or high setting when low or high pin is connected to ground.
In some controllers there's speed and current setting, in simpler ones only speed setting for the two options. Impossible to say how program logic is built without testing it :D

"or button input" means that if you don't have three speed switch then one switch can be used - logic and function will be the same as for the three speed switch except that only one setting is used instead of two.
Ride on :D

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scootergrisen   1 W

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Re: Unknown 3 wire connector

Post by scootergrisen » Aug 12 2019 9:26am

What does "(Active low)" mean?
I tried shorting the cruise pin to GND but did not seem to do anything.
I was expecting it to keep the speed when i let go of the throttle.

larsb   100 kW

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Re: Unknown 3 wire connector

Post by larsb » Aug 12 2019 11:00am

Ride on :D

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