Electrical connection question

[Shockwave]

Hello everyone, still building my bike and the kit came with a typical twist throttle that has 3 wires, red, white and black, but I want to go with a thumb throttle, and those wires are red, white, and green. Is it as simple as connecting red to red, black to black, and connecting the green to the white wire? Thank you for your help

 

[lnanek]

Wire color generally isn't a reliable indicator of anything in ebikes. It can even vary just based on what wires the factory worker had sitting in a parts picker bin that day.

If the controller or throttle had/have a connector on them, look for a diagram with the pins labeled. Barring that, yes, black is often ground, red is often positive, and green is often signal and white theoretically might be signal as well. For positive, +5V is common for throttles.

It can damage the hall sensor on the throttle if you get it wrong, but you should probably use the above as a guess and wire in ground, +5V,, and then check with a multimeter if the signal voltage changes as you twist.

 

[E-HP]

a thumb throttle, and those wires are red, white, and green.

Do you mean red black and green?

 

[Shockwave]

Do you mean red black and green?

Yes you are correct, I misspoke, thumb throttle is red, black and green

 

[Shockwave]

Ok guys, I am definitely not an electrician, but I just took my multimeter and set it on "Ohm's Resistance", and when I touch the black and red wires on both the thumb throttle and also the twist throttle, I get resistance, because when I do any other combination with the white wire on the twist throttle, or the green wire on the thumb throttle, I get nothing. So am i correct in assuming that using the thumb throttle, red would go to red, black would go to black, and the green wire from thumb throttle will go to the white connector on the controller? Thanks guys

 

[amberwolf]

Most of these throttles are not potentiometers you can measure resistance on. They are usually hall throttles that require 5v power to operate, and provide a signal out as they are turned, that usually varies from around 0.8-1.4v at full off up to around 3.0-4.5v at full on.

To test it you'll need to apply 5v to the power wires, which are probably red + and black -, though there is no guarantee of that.

But it is very likely that both throttles use red for +5v, black for ground (-), and the remaining wire is the signal output.

 

[E-HP]

Ok guys, I am definitely not an electrician, but I just took my multimeter and set it on "Ohm's Resistance", and when I touch the black and red wires on both the thumb throttle and also the twist throttle, I get resistance, because when I do any other combination with the white wire on the twist throttle, or the green wire on the thumb throttle, I get nothing. So am i correct in assuming that using the thumb throttle, red would go to red, black would go to black, and the green wire from thumb throttle will go to the white connector on the controller? Thanks guys

These are hall sensor based throttles, not resistance.
This guide may help with troubleshooting:

Guide to Hall Sensor Throttle operation, testing, and modification. - Electricbike.com Ebike Forum

***** 8-16-2018 Welcome to the Hall Sensor Throttle Thread! If there is something you'd like to add, correct, needs better explanation, or have a question about... feel free to Private Message me. Better yet, open a new thread in the "Trouble Shooting...

electricbike.com

 

[Shockwave]

Thanks guys, the more I read the more confused I get. Lol. I will let you guys know if I decide to try the thumb throttle or just be safe and go with the twist throttle that came with the kit. Thank you for your input