Appreciate your offer - thank you.
The symptoms are that the display (a unit that shows power selection and battery charge level only - no LCD) shows a maximum power selection (3 red lights) and will not switch the motor on or the light. The motor has no pedal assist, and the battery shows a full charge (probably accurate as it is regularly recharged). The display is a sealed unit with no signs of damage, the wiring is in good condition with no abrasion and the connectors are all firmly seated.
When I removed the controller to check the wiring connections and replaced it, there was briefly (2 or 3 seconds) power to the motor, but this then reverted back to the failed state. I suspect a capacitor fault, but have no way of testing it.
All suggestions gratefully received!
If your motor worked for a short while, there's probably nothing wrong with the controller, and to put your mind at rest, capacitors in the controller simply don't fail.
Your LED control panel is giving an error code. You can ring Juicy to find out what it means. They should have the manual for it. The error indicated doesn't always relate directly to the cause, so tell us what it is if you want guidance on how to find the cause.
One of the error codes is the brake switch in the on state at startup. The bike will work without brake switches connected, so disconnect the brakes from the controller to eliminate that as a cause.
Another code means non-zero throttle signal at startup, so disconnected it it to eliminate it as a cause.
Likewise, to eliminate or confirm the motor or its wiring as the cause, disconnect the motor connectors together.
After that, you need a meter to test. As I said before, the tests are very easy. Anybody can do them. Let me know when you have a meter and please show a photo of which connectors you have at the controller end.