Bought a bike, thought it would be an easy fix. 🤦‍♂️

[bob_cbr]

So, bought a second hand ebike, but it did not have a downtube battery. No problem, I will slap on an existing DIY battery and just wire it into the Hailong connector. These 5 pin Hailong connectors normally only have Pos & Neg connected but this one has all the pins wired up to the controller.

So I wire up the main positive & Negative, the LCD screen all works, reports speed, but the is no assist from the motor

Does any know what i need to send to these three pins (Red, Yellow, green)? Found some details which i will detail below.

Google gives me next to nothing back for the controller: LSW943-190f (2018)




The only thing I could find on the internet was:

Which looks correct, but I'm still not sure were to go from here. Maybe send 5v to the controller on the red "Battery info" pin?

 

[beemac]

The wiring diagram appears to show pins 3/2 yellow and green providing +ve and -ve to the LCD, pins 5/1 providing the same to the controller. And I'm guessing pin 4 the blue is a switched +ve to power the controller on/off assuming the battery was where the bike on/off switch was. But i'd definitely do some more researching before applying battery voltage to anything you're not sure of...

Googling the g3m20211 brings up quite a few results, might find more info that way.

 

[E-HP]

Is this a factory ebike or converted bike? It’s possible that the power on/off function turns on both the controller and battery.
There are some Lishui controller experts on the forum, so maybe they can provide some insights.