Which colour wire

[billyboya]

Green LED staying on all the time, is ALSO an indicator that the battery is not charging, as it has "slipped" below the voltage level (for any one of many reasons) at which the charger is allowed to charge!
The reason I commented as I did previously, was because your original question did not indicate whether you were asking about the mains input AC side or the output DC side....At least one other was also mislead by your question.....So I was not alone in that, and I treat safety with a huge respect! Many don't!!

Yes you are correct I didnt mention, what end I was refering to like I should have said the DC end. But I knew where wires go on wall plugs AC as done loads over the years. so please accept my apologies

 

[Andy-Mat]

My Chinese charger is BLUE positive and brown negative.

Many thanks for your post, demonstrating clearly that without a meter, guessing might have caused serious damage to your e-bike.
Sadly its nothing new from Chinese products. For instance, I bought two identical controllers for a friend of mine (he is not an online person!), from the same ebay company, same order, and the wiring colours were not identical even then!
We had to go by the connectors if I remember correctly!!!
Other owners here are now clearly warned by your excellent comment, thanks.

Andy