How to test throttle wires from controller?

[Smart]

I'm trying to add a throttle to my E-bike and it's just not working..

The controllers throttle wires are black/red/green and the wires from my throttle are black/red/white
I connected red to red and black to black and green to white but nothing happened when the bike was on and i pressed the throttle.
I have the checked the voltage across the red/black coming from the controller and they give me a reading of 4.4v, I have also checked that the green wire is definitely the throttle by taking the controller apart and tracing it to the correct place marked for the throttle.

I then tried connecting the controller throttle red to the controller throttle green in order to simulate an open throttle but still the motor would not spin.

What else can I check in order to figure out what is wrong and what I should do to rectify it?

My controller is an lsw891 (atleast thats what the sticker says) but the closest I can find on the manufacturers site is lsw80a and lsw70a, Ive checked the wiring diagrams and my controller matches both of them and appears to be wired correctly according to them.

 

[dnmun]

have you ever used this controller before? do you know that it works? is the throttle new or used?

you should have been able to measure the throttle voltage on the green/white wire when you twisted the throttle.

a 3V battery between the white wire (+) of the controller and the black (ground) should make the controller turn the wheel if it is working.

 

[Smart]

have you ever used this controller before? do you know that it works? is the throttle new or used?

you should have been able to measure the throttle voltage on the green/white wire when you twisted the throttle.

a 3V battery between the white wire (+) of the controller and the black (ground) should make the controller turn the wheel if it is working.

The controller works and is currently running well using pedelec, it came prebuilt and I wanted to add a throttle to it as the controller has the functionality but the throttle wasn't fitted due to the manufacturer having two models one for USA with throttle and one for UK without.
The Throttle is a new thumb throttle purchased from BMSbattery
The controller has Green/Red/Black so do you mean use a 3v battery between the green and black?

 

[dnmun]

ok, you did not mention pedelec before so i suspect that is why the throttle doesn't work.

yes of course i mean putting the battery between the green and the black, i hope you use the right polarity too so i included that also.

 

[Smart]

I did ask in the forum before I bought a throttle if it was a case of just wiring it up and it would override the pedelec automatically, I was told that was the case.
I will try your test and post results.

So the pedelec could be the cause of the throttle not working then?

 

[dnmun]

why not ask the people who sold you the pedelec controller how to modify it.

 

[whatever]

you can short the red/green together on the controller, make sure wheel is off the ground, it should give you full throttle,
if motor doesn't spin it means its a controller problem, be careful though as shorting these two when battery power is on and everything
connected to motor gives full throttle immediately, you can just touch the wires together briefly to see what happens.
If you dont get anything it maybe something to do with pedal first sensor or whatever way the controller works.

 

[Smart]

why not ask the people who sold you the pedelec controller how to modify it.

The bike came complete and I've already been trying to contact the manufacturer and distributor but have not received a reply in over 2 months when I first mailed them regarding a different issue with the bike (turned out to be a faulty ignition switch)

 

[Smart]

you can short the red/green together on the controller, make sure wheel is off the ground, it should give you full throttle,
if motor doesn't spin it means its a controller problem, be careful though as shorting these two when battery power is on and everything
connected to motor gives full throttle immediately, you can just touch the wires together briefly to see what happens.
If you dont get anything it maybe something to do with pedal first sensor or whatever way the controller works.

I have tried your suggestion and nothing happened. It was the first thing I tried. I tried it with the pedelec disconnected too.

 

[dnmun]

shorting the red to green will not cause the motor to turn. the controller logic sees that as a short in the throttle and disables the controller.

 

[kentlim26]

is the controller has definite a problem. since u have tried that method, test meter the two wires red n black has a voltage 4v to 4.5v . sure more than 4v n over. do you have a spare sure working controller?? this is fastest and easy way out to know which is faulty? i have few good and sure working controller as a spare white elephant. I have few spare sure good controller are also white elephant too. I dont mind.

 

[whatever]

have to disagree with dnum, haven't found a controller yet where you cant short the red/green or equivalent to get full throttle,
have you tried it?? I've been using that test for many many years. It just gives you 5v to the controller via the green wire, which is what the hall sensors
do in the throttle when at full throttle ( you do loose a little bit of voltage via hall sensor even at full throttle)

I suspect the controller has a problem, there is a possibility it wont work via throttle alone if its meant for pedal first european type regulations.

 

[kentlim26]

If is a pedal first controller, then hand spin the wheel first hard and see whether it run or not + throttle press on too. never mind , just get one greentime or huatong, or borrow a controller and do a test.

 

[John in CR]

Throttle voltage sounds low. It should be much closer to 5V, not 4.4V. I had that on a brand new controller, and it sits in the to be repaired box of controllers without having ever spun a wheel. You should keep a spare controller on hand anyway, so start that process now while tracking down the seller. Since it is rigged for a pedal sensor, then it's low enough power that it shouldn't cost more than $30-40 for a better replacement/spare.

 

[Smart]

Forgive the late response, I've been away for a few months

Throttle voltage sounds low. It should be much closer to 5V, not 4.4V. I had that on a brand new controller, and it sits in the to be repaired box of controllers without having ever spun a wheel. You should keep a spare controller on hand anyway, so start that process now while tracking down the seller. Since it is rigged for a pedal sensor, then it's low enough power that it shouldn't cost more than $30-40 for a better replacement/spare.

The 4.4v is the throttle voltage stated on the sticker attached to the controller casing.



I've just ordered a new controller from bmsbattery.com I went for the ku65 controller, hopefully it can be swapped out for the one in the image above.

Is there anything else I can test while I'm waiting for my new controller to arrive?

 

[Smart]

If is a pedal first controller, then hand spin the wheel first hard and see whether it run or not + throttle press on too. never mind , just get one greentime or huatong, or borrow a controller and do a test.

Tried this and it didn't make a difference, at first I thought I could hear the motor attempting to spin after the throttle was engaged and pedelec was no longer being pedalled but it wasn't. I even tried taking it out for a ride and seeing if the throttle would work once I had used the pedelec to start off but still the throttle did nothing.