Carrera problem

L6mbt

Pedelecer
Feb 1, 2019
30
6
My Carrera E-Vengeance, which has served me well for three years, has now gone sulky! It was fine a few days ago; I removed the battery for a charge but, although the battery now shows a full charge, the bike does not respond, although all the operational lights come on. (It is a 2018 model with the Bafang motor so I had hoped it would not suffer with the common Suntour problems). I occasionally get a momentary surge on startup, so there is a flicker of life in the system. I have looked in vain for damaged or loose wires; I thought the pins which connect the battery to the electrical circuit could be a suspect point so cleaned those thoroughly, but without success. Any ideas, please?
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
16,585
6,461
58
West Sx RH
Check the motor connector hasn't been disturbed.
Disconnect any brake sensors to rule out a faulty one.
If still no luck one will have to wire test the controller mosfets for resistance and check the motor Halls are good.