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A big thank you to everyone who has replied with advice. Replacing the controller has not helped so I suspect that the battery will need replacing at a cost of over 290 euro. I can buy a new bike for about 800 euro. I am giving the old one to a person who has the time and patience to try a fix it.

I am uncertain what you mean. The description of the wires/connectors at the beginning of my post are those that are on the bike. The cable colours correspond to those on photo KZQW22A-XDL. Those colours do not all tally with those on the replacement controller. Thanks for drawing my attention...

Thank you for your prompt reply. The original controller is marked KZQW22A-XDL SUZHOU TONGSHENG BICYCLE Co The replacement is: https://www.amazon.com.be/-/en/dp/B089PR1TXM?ref=ppx_yo2ov_dt_b_product_details&th=1&psc=1

An old SilentForce SF 0201 has stopped working. The LED shows minimum charge but a battery voltage test shows 36v. I have purchased a replacement controller but it has more connectors than on the bike. The bike has only seven JST SM connectors. I need to identify the following cables. 2 pin...