Changing and moding throttle, Advice needed please.

[papajay2020]

Hi all,

I'm new here so sorry if this is the wrong thread.

Can anyone advise or help with my query, please.

I'm quite new to electric bikes but have some minor experience with electrics. I brought a generic cheap Chinese bike online in general I'm happy with it but I want to change the twist throttle to a thumb throttle, in my head it should be easy, hmmm, not.

On my existing throttle, I have a 5 pin green Juliet connector and an on/off button. (which is totally pointless as I need a key and long press on the control screen to fire up.) I don't know what controller (pic of LCD included)I have so it makes it hard to track down information on this. I'm guessing two of the 5 wires control a simple circuit switch while the remaining 3 work with the controller. The bike is 48v with a 350w motor and 10Ah battery.

So my question really is can I close the button circuit and bypass it and then use any throttle, and secondly does anyone know what controller I have and where I can find out more about it for future upgrades.

Thanks so much for taking your time to help.

Link to pics; https://drive.google.com/file/d/13XVFGkh4KL26nm0Fp4USDvjlTxf3RxEO/view?usp=sharing, https://drive.google.com/file/d/1GW5d5C8gq6VJ9JLwvOafuBnzhO8qHydd/view?usp=sharing, https://drive.google.com/file/d/1k81rec4Cef2nZHAbnXekyoagFig-fA8u/view?usp=sharing

JJ

 

[papajay2020]

Hi all,

I'm new here so sorry if this is the wrong thread.

Can anyone advise or help with my query, please.

I'm quite new to electric bikes but have some minor experience with electrics. I brought a generic cheap Chinese bike online in general I'm happy with it but I want to change the twist throttle to a thumb throttle, in my head it should be easy, hmmm, not.

On my existing throttle, I have a 5 pin green Juliet connector and an on/off button. (which is totally pointless as I need a key and long press on the control screen to fire up.) I don't know what controller (pic of LCD included)I have so it makes it hard to track down information on this. I'm guessing two of the 5 wires control a simple circuit switch while the remaining 3 work with the controller. The bike is 48v with a 350w motor and 10Ah battery.

So my question really is can I close the button circuit and bypass it and then use any throttle, and secondly does anyone know what controller I have and where I can find out more about it for future upgrades.

Thanks so much for taking your time to help.

Link to pics; https://drive.google.com/file/d/13XVFGkh4KL26nm0Fp4USDvjlTxf3RxEO/view?usp=sharing, https://drive.google.com/file/d/1GW5d5C8gq6VJ9JLwvOafuBnzhO8qHydd/view?usp=sharing, https://drive.google.com/file/d/1k81rec4Cef2nZHAbnXekyoagFig-fA8u/view?usp=sharing

JJ

 

[papajay2020]

Hi all,

I'm new here so sorry if this is the wrong thread.

Can anyone advise or help with my query, please.

I'm quite new to electric bikes but have some minor experience with electrics. I brought a generic cheap Chinese bike online in general I'm happy with it but I want to change the twist throttle to a thumb throttle, in my head it should be easy, hmmm, not.

On my existing throttle, I have a 5 pin green Juliet connector and an on/off button. (which is totally pointless as I need a key and long press on the control screen to fire up.) I don't know what controller (pic of LCD included)I have so it makes it hard to track down information on this. I'm guessing two of the 5 wires control a simple circuit switch while the remaining 3 work with the controller. The bike is 48v with a 350w motor and 10Ah battery.

So my question really is can I close the button circuit and bypass it and then use any throttle, and secondly does anyone know what controller I have and where I can find out more about it for future upgrades.

Thanks so much for taking your time to help.

Link to pics; https://drive.google.com/file/d/13XVFGkh4KL26nm0Fp4USDvjlTxf3RxEO/view?usp=sharing, https://drive.google.com/file/d/1GW5d5C8gq6VJ9JLwvOafuBnzhO8qHydd/view?usp=sharing, https://drive.google.com/file/d/1k81rec4Cef2nZHAbnXekyoagFig-fA8u/view?usp=sharing

JJ

 

[amberwolf]

On my existing throttle, I have a 5 pin green Juliet connector and an on/off button. (which is totally pointless as I need a key and long press on the control screen to fire up.)

What specifically does the switch do on your system, when in each position?

Depending on what the button is wired to do, this is often still useful--some of them are wired to shut off power only to the throttle itself, which can keep you from accidentally "launching" the bike when walking it while still having it turned on (for whatever reason).

The other way they are commonly used is to switch the full battery voltage to the controller's keyswitch/ignition (ksi) line, which is also what your display button does inside the display itself.


If you don't need the switch, you can just bypass it. To do this you have to find out which pair of pins it uses. There are a few images here
https://www.google.com/search?q=julet+throttle+pinout&tbm=isch
https://www.google.com/search?q=higo+throttle+pinout&tbm=isch
of higo and julet throttle pin connections, if yours is standard wiring. Most are three-wire, but some are 5-wire, and may have different funcitons for the two non-throttle wires.


If you have a multimeter, you can check the pins on your original throttle for what the button wires connect to. If the throttle has male pins, this is easy to do, if it has female holes you may need to use needles or pins inside the holes to reach them with the meter leads. Disconnect throttle from system. Set meter to 20ohms or continuity if it has that.

Red meter lead on pin 1, black on pin 2. If the meter reads OL, press the button. If it doesn't change, its not those pins. If it changes to a very low reading or beeps, it's those two pins.

To test the next pair, move red lead to pin 3. don't forget to press the button if you get OL.

To test the next pair, move black lead to pin 4. don't forget to press the button if you get OL.

To test the next pair, move red lead to pin 5. don't forget to press the button if you get OL.

If none of them gives a reading other than OL, then you don't have a standard battery-voltage KSI switch on there, and thus you probably don't need to worry about bypassing this switch.

I don't know what controller (pic of LCD included)I have so it makes it hard to track down information on this.

A pic of the controller itself, of any labelling on it, so that the labels can be read, is more useful (many LCDs look similar). Note that none of your links allow access. Uploading the pics directly to your post with the Attachments tab will work for anyone that can see your post. It will automatically resize them for you, so use the original pic size for best detail.

 

[papajay2020]

Hey,
Thanks for the help, when I press the button it cuts all power to the battery and turns the LCD off, I have to press it first then press and hold the one next to the LCD to turn the LCD on, and only then does the power turn on this is all after a battery key turn first.

please see pics of the controller.

If I disconnect to wires for the button do I need to bridge the wires so they are connected together?

https://photos.app.goo.gl/hZ8478h7uDT1GM1B9

https://photos.app.goo.gl/Yp5ZBzZBPchMzi2g7

https://photos.app.goo.gl/Yp5ZBzZBPchMzi2g7

 

[amberwolf]

Thanks for the help, when I press the button it cuts all power to the battery and turns the LCD off, I have to press it first then press and hold the one next to the LCD to turn the LCD on, and only then does the power turn on this is all after a battery key turn first.

If I disconnect to wires for the button do I need to bridge the wires so they are connected together?

In this case, yes, as long as those wires measure as I noted before. (they probably do, but you should check so you don't damage anything).

FWIW, *most* of the time, but not always (again, you should check before connecting things), the actual throttle signal wires will be red for 5v, black for ground, and green (or white) for throttle signal.

Colors for the button wires could be anything.

please see pics of the controller.
https://photos.app.goo.gl/hZ8478h7uDT1GM1B9

This shows a "model number" that is probably WBT10H-20-LD5-705A; the ST number is probably a serial number. I coudln't locate anything relevant in a search for the numbers, whole or in part, so unfortunately that's a dead end.

https://photos.app.goo.gl/Yp5ZBzZBPchMzi2g7

I can't tell anything relevant from this picture; unfortunately wiring pics are usually only useful if they show the entire wiring path inclduing what they go to and come from. That's usualy impossible to show in a picture.