Will this display and controller combo work? (save me from another costly mistake)

[Tezzy]

I've already killed two new KT controllers by trying to pair them with an 810LED 5 Pin display, so I really hope some experts can save me from killing another controller. Does anyone know if the below combo will work? I will be using it with only throttle, not PAS (but I pedal myself 80% of the time and use the motor to help me on inclines and for short breaks), on a 36v 10.4AH battery and a 250w Bafang geared fat tire hub motor.

Display:

https://www.amazon.ca/gp/product/B0C9JQM9C1/ref=ox_sc_saved_image_1?smid=A2RDMUKIMH62O3&psc=1

Alternative Display:

https://www.aliexpress.com/item/1005003523378299.html?spm=a2g0o.productlist.main.101.3d8ab8d6kwyFPZ&algo_pvid=69e47c62-4408-4a7d-abce-2f91ac30c2b5&algo_exp_id=69e47c62-4408-4a7d-abce-2f91ac30c2b5-50&pdp_npi=4%40dis%21CAD%2121.22%2120.51%21%21%2114.93%2114.43%21%402101ea8c17301597714695988e4d0a%2112000026165010329%21sea%21CA%210%21ABX&curPageLogUid=TexmXovOItGd&utparam-url=scene%3Asearch%7Cquery_from%3A

Controller:

https://www.amazon.ca/gp/product/B09L85NSYN/ref=ox_sc_act_title_1?smid=AACVUJ6SFQ2UJ&psc=1

 

[99zip99]

Clue. !!
The wires from China mean nothing color wise just like Italy Italian cars they can use a green wire and make it come out blue or black or red somewhere along the way.
But back to controller and display by a match set.
Get one that is self learning then you don't have to worry about matching the phase (3) and the (5) hall wire combos . Now the display and the controller are plug and Play. There's usually just three wires to the throttle.

 

[Tezzy]

Clue. !!
The wires from China mean nothing color wise just like Italy Italian cars they can use a green wire and make it come out blue or black or red somewhere along the way.
But back to controller and display by a match set.
Get one that is self learning then you don't have to worry about matching the phase (3) and the (5) hall wire combos . Now the display and the controller are plug and Play. There's usually just three wires to the throttle.

If you look at the controller I linked, it has the 9 pin motor connector which means I don't have to worry about matching the phase and hall wires as my bike's motor has the same waterproof 9 pin connector. That's why I'm looking only at the controllers with that connector, but it limits my options greatly in terms of finding a suitable controller and display combo that's included in one package for a reasonable cost.

 

[lnanek]

Two 9 pin connectors from different merchants aren't guaranteed to have the same pin out.

 

[99zip99]

Uh-oh 9 pin colors don't mean anything. Chinese red doesn't mean positive and black doesn't mean negative and who knows if you're nine pins match ???
It's better and smarter to buy them together plug and Play from one vendor same manufacturer same deal meant to plug together.
It's easy to get tricked .
I guess you're a gambler. You don't have to roll the dice.
If you could think back you will find out some European sports cars are positive ground to the chassis and not negative ground to the chassis.

 

[docw009]

I suggest the LCD display. Fits any KT controller is you select the right connector
,

https://www.aliexpress.us/item/3256806395146961.html?spm=a2g0o.productlist.main.3.4327jacmjacmpD&algo_pvid=0f3ed329-2fbc-4e20-9a7b-ed6637168a0a&algo_exp_id=0f3ed329-2fbc-4e20-9a7b-ed6637168a0a-1&pdp_npi=4%40dis%21USD%2134.65%2134.65%21%21%21246.24%21246.24%21%402101c72a17301697220723484e0f9c%2112000037725285999%21sea%21US%21742508029%21X&curPageLogUid=ZUElbytrJ3u5&utparam-url=scene%3Asearch%7Cquery_from%3A

 

[docw009]

Don't like those handlebar units at all,

If you have a 9 pin motor cable on the existing motor and just want to use throttle, you could look at this model. Available with LCD3 display, throttle, plus the handlebar harness for $75 USD>.

You won't have the matching brake levers though. That makes the price $103.

https://www.aliexpress.us/item/3256801093693353.html?src=google&pdp_npi=4%40dis%21USD%2148.53%2148.53%21%21%21%21%21%40%2112000015565367049%21ppc%21%21%21&src=google&albch=shopping&acnt=708-803-3821&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&gclsrc=aw.ds&albagn=888888&ds_e_adid=&ds_e_matchtype=&ds_e_device=c&ds_e_network=x&ds_e_product_group_id=&ds_e_product_id=en3256801093693353&ds_e_product_merchant_id=109141880&ds_e_product_country=US&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=19558607238&albag=&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gclid=Cj0KCQjw7Py4BhCbARIsAMMx-_L6jov_PA-39NMsrNQtq8dbCDTKbujX8vNniVGhCwjEktCUIsWwvpkaAp8rEALw_wcB&gatewayAdapt=glo2usa

 

[99zip99]

Tezzy what part of the world are you in as shipping cost can be prohibitive and ?

 

[E-HP]

If you look at the controller I linked, it has the 9 pin motor connector which means I don't have to worry about matching the phase and hall wires as my bike's motor has the same waterproof 9 pin connector. That's why I'm looking only at the controllers with that connector, but it limits my options greatly in terms of finding a suitable controller and display combo that's included in one package for a reasonable cost.

The controller and controller display must be of the same brand t be compatible. In addition, even if the same brand, the features or voltages, etc., may not be supported, so irs always best to buy both as a pair/kit.

Here are a few popular KT displays. There are others if you search online.

• Kunteng "KT" LCD3, LCD4, LCD5, LCD7, LCD8H, LCD8S, LCD9, LCD10H, LED880

 

[99zip99]

Do the pins the wires the colors and the order of the wires to the pins to the controller to display does that really matter I have a left toe and I have it right big toe we're talking about big toes today I take my right big toe off and put it into my left big toe or my left big toe and replace it for my right big toe I wonder how that would work when I walk straighter maywood straighten up my back I would never have to go see a chiropractor ?

 

[fill]

In order to 'program' a kt-led display you need a kt-lcd display to set and transfer the config. Details can be found in the last few pages of the kt-lcd03,10, and 8 manuals, and you need to knock up a dedicated display to display comm wire with power.

 

[99zip99]

Are you trying to say buy a match set that are made to use the same connection in the same kit from the same vendor ? With PayPal in case something happens you have something to rest on ? Or for return I mean some Chinese vendors all you get is that snapshot of a picture paste it on the box and what they send you inside might resemble what the picture they took of the real product Pace on the outside of your box

 

[Tezzy]

The controller and controller display must be of the same brand t be compatible. In addition, even if the same brand, the features or voltages, etc., may not be supported, so irs always best to buy both as a pair/kit.

Here are a few popular KT displays. There are others if you search online.

• Kunteng "KT" LCD3, LCD4, LCD5, LCD7, LCD8H, LCD8S, LCD9, LCD10H, LED880

Yes that display is sold as a KT display. The KT900s. I really just want to do without a display entirely. I'm being told by some here that shorting the red and blue wires on the controller display connector will let it run without, but others say I also need to short the black and yellow. This uncertainty is what holds me back, because I have already somehow killed two KT controllers just by running them for a minute with an 810LED 5 pin display. I cannot afford to fry a third controller.

 

[E-HP]

Yes that display is sold as a KT display. The KT900s. I really just want to do without a display entirely. I'm being told by some here that shorting the red and blue wires on the controller display connector will let it run without, but others say I also need to short the black and yellow. This uncertainty is what holds me back, because I have already somehow killed two KT controllers just by running them for a minute with an 810LED 5 pin display. I cannot afford to fry a third controller.

Your controller should have come with this jumper to run without a display. Pin 1 & 2 are battery voltage + and the signal wire that turns on the controller, so a switch can be used instead of that blue conductor for on/off.

 

[E-HP]

Yes that display is sold as a KT display. The KT900s.

Which of these are you using?

KT 900S

810 LED (one variant of 5 pin)

 

[fill]

Afaik on startup your controller expects to receive a package of info from the display unit telling it what pas sensor and how its configured, how many pas levels and if pas is enabled among other details.. Without these it cannot set up and provide pedal assisted help.

see page 40 of this kt lcd10 manual pdf for details in how to execute a parameter copy from a LCD display which has been set to describe the attached pas sensor etc to an LED display including the cable make up required.

YOu Need a suitable lcd display to a) Set the controller parameters to operate your bike/motor/sensors and b) copy this set up to the LED display.

Running headless with no display is easy, but is throttle only no pas, And no battery level indication.

 

[Tezzy]

Which of these are you using?

KT 900S

810 LED (one variant of 5 pin)
View attachment 361347View attachment 361347

Thank you for helping me. This is the controller that I killed two of:

https://www.amazon.ca/gp/product/B0D2PHPG42/ref=ox_sc_saved_image_4?smid=A2I9BQBR4HKIKH&psc=1

The display I have is an 810LED (5 wire) like the one you posted with the 6km button, but with a green 5 pin Julet connector. I matched the wire colours, which were all the same as on the controller. It powered the controller on and off, but within a minute or two of riding, the controller got slower and slower until it no longer worked at all. This happened with two of the same controller. I don't understand how it could fry these controllers and would like to fully understand what's happening there. Anyway, now I wish to buy another KT controller and run it without a display, by shorting the wires. The controller does not come with a jumper plug, so I want to make sure I know for sure which wires to short. I plan to buy this controller: https://www.amazon.ca/gp/product/B09L85NSYN/ref=ox_sc_saved_image_6?smid=AACVUJ6SFQ2UJ&psc=1

 

[Tezzy]

Afaik on startup your controller expects to receive a package of info from the display unit telling it what pas sensor and how its configured, how many pas levels and if pas is enabled among other details.. Without these it cannot set up and provide pedal assisted help.

see page 40 of this kt lcd10 manual pdf for details in how to execute a parameter copy from a LCD display which has been set to describe the attached pas sensor etc to an LED display including the cable make up required.

YOu Need a suitable lcd display to a) Set the controller parameters to operate your bike/motor/sensors and b) copy this set up to the LED display.

Running headless with no display is easy, but is throttle only no pas, And no battery level indication.

Thanks. Running with throttle-only is my strong preference. I mainly pedal un-assisted and use the throttle to get me up the inclines and when I get tired. I will not be connecting PAS. I have a voltage meter for battery levels and a separate bike computer for speed and distance. I don't need a display.

 

[fill]

I have a lil length of wire with bare tinned ends jumping the blue/red controller side display wires, and a $1 ali express cycle computer speedo ( the one you set the wheel circumference in mm to configure) on the handlebars of my 'stealth' bike..

- not an everyday ride, but its seen some use without issues..

 

[E-HP]

Thank you for helping me. This is the controller that I killed two of:

https://www.amazon.ca/gp/product/B0D2PHPG42/ref=ox_sc_saved_image_4?smid=A2I9BQBR4HKIKH&psc=1

The display I have is an 810LED (5 wire) like the one you posted with the 6km button, but with a green 5 pin Julet connector. I matched the wire colours, which were all the same as on the controller. It powered the controller on and off, but within a minute or two of riding, the controller got slower and slower until it no longer worked at all. This happened with two of the same controller. I don't understand how it could fry these controllers and would like to fully understand what's happening there. Anyway, now I wish to buy another KT controller and run it without a display, by shorting the wires. The controller does not come with a jumper plug, so I want to make sure I know for sure which wires to short. I plan to buy this controller: https://www.amazon.ca/gp/product/B09L85NSYN/ref=ox_sc_saved_image_6?smid=AACVUJ6SFQ2UJ&psc=1

That isn't a KT display. There are over a half dozen versions of that display, some walk mode and assist level, some support lights, but they aren't providing the data signals the KT controller is expecting, and could be damaging the controller, that's expecting a data signal over those wires. There's also an analog version that I've been looking for the manual for, for my records.
I'd advise against connecting that display to your new controller. Some links have been provided above by others to compatible KT displays.

A note on wire colors:
Wiring:
There are no wiring standards or wire color coding standards. If you are building from components, you cannot count on things working, just because you matched the wire colors on the connectors between devices. Use your DMM and realize that touching the wrong combination of wires can destroy electronics, instantaneously.

 

[Tezzy]

That isn't a KT display. There are over a half dozen versions of that display, some walk mode and assist level, some support lights, but they aren't providing the data signals the KT controller is expecting, and could be damaging the controller, that's expecting a data signal over those wires. There's also an analog version that I've been looking for the manual for, for my records.
I'd advise against connecting that display to your new controller. Some links have been provided above by others to compatible KT displays.

A note on wire colors:
Wiring:
There are no wiring standards or wire color coding standards. If you are building from components, you cannot count on things working, just because you matched the wire colors on the connectors between devices. Use your DMM and realize that touching the wrong combination of wires can destroy electronics, instantaneously.

Thanks. I will not be using any display, so I will just order the controller and hope that shorting the display wires works.

 

[Tezzy]

Your controller should have come with this jumper to run without a display. Pin 1 & 2 are battery voltage + and the signal wire that turns on the controller, so a switch can be used instead of that blue conductor for on/off.

I want to thank you for posting the video. It did not appear properly for me earlier when I read that reply, but I can see it now. Thanks very much.