Motor cut off under load and speed

seba240698 said:

PS : I saw on the online website, some controllers do not have PAS connection, only throttle connection, can I buy those and connect my PAS To the throttle wires from the controller?

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https://endless-sphere.com/forums/viewtopic.php?f=51&t=116789&p=1722499#p1722499

I bought a new LED Display and a new controller.

When I connected my new LED Display with my NEW controller, the LED did not power up. See attached photos.

To narrow down the problem, I did the following:-

1) I connected my NEW LED Display with my OLD controller, it didn’t powered up too,

2) I then connected my OLD LCD Display with me NEW controller, it powered up, but when I turned the pedal, the motor did not turn,

3) I then connected my OLD LCD Display with my OLD controller, the same old problem came back, the motor will cut off intermittently and then came back and this problem repeated itself.

4) In order to be sure that the PAS is not the problem, I measured the PAS voltage as I turned the pedal, it was between 2.8 to 2.9 V, quite consistent, even when the motor cut off, the PAS was at 2.8 to 2.9 V. Can I conclude from here that there is no problem with my PAS?

I suspected that the reason for the NEW LED Display not powering up is because I connected the wires wrongly.

From the LED side, it has red (positive), blue (electric door lock, what is this?), black (negative), green (data receive) and yellow (data transmit). See attached photo.

From the controller side, it has red (positive), orange (VCC, what is this?), black (ground), green (data transmit) and yellow (data receive). See attached photo.

Is it correct to connect the blue (electric door lock) to the orange wire (VCC)?

Anyone can advise me what I should do next?



Thank You.

seba240698 said:

I suspected that the reason for the NEW LED Display not powering up is because I connected the wires wrongly.

From the LED side, it has red (positive), blue (electric door lock, what is this?), black (negative), green (data receive) and yellow (data transmit). See attached photo.

From the controller side, it has red (positive), orange (VCC, what is this?), black (ground), green (data transmit) and yellow (data receive). See attached photo.

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your display connector wiring order doesn't match the documentation.
hopefully you didn't fry something. if the wiring colors are correct in the documentation, it looks like operating the on/off would short battery voltage to ground.

What are the black and white wires from the LED Display for? What should I connect them to?

seba240698 said:

What are the black and white wires from the LED Display for? What should I connect them to?

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Who knows, since the documentation isn't accurate. Looking at the display, it supports on/off of the controller, and looks like it supports light. The crappy/inaccurate documentation shows the 5 pin connector supports on/off. So, by process of elimination...

seba240698 said:

What are the black and white wires from the LED Display for? What should I connect them to?

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It looks like those wires would manage the light. I see you have a light button there. If it were me, I would connect the display wires, then get your meter. Measure the voltage of the black and white wires, then toggle the light button. Are you able to toggle the voltage on and off.