Bafang bbs02 not turning on

[Peter.Bridge]

Hi all, (3 year old) Bafang bbs02 not turning on

I have checked the green 5 pin connection. From the controller to the display and there is 54.4v between P+ and ground so I think it must be something to do with the display ?

P850c display with separate power +/- button on the handlebar

 

[Peter.Bridge]

Just disconnected everything and reconnected and is working ok !

And stopped working, ok I will order a new display, seems to have voltage from the controller to the green 5 pin display connection

 

[guerney]

Has your wiring harness been damaged a little? It's why I ziptie over plastic webbing to the bike frame, rather than directly, avoids pinching cables risking damage to fine wires within the things.

https://www.ebay.co.uk/itm/197291213975

 

[saneagle]

Just disconnected everything and reconnected and is working ok !

And stopped working, ok I will order a new display, seems to have voltage from the controller to the green 5 pin display connection

When you get your new one, it might be worth opening the old one to see what was wrong - pulled wire, water ingress, bad solder or whatever.

Instructions for opening and one fix here:

Bafang 860C display dead - Electricbike.com Ebike Forum

Hi guys, I've got an 860C display which appears to be completely dead. I've got a second ebike with an 860C display which works ok. I've tried swapping the dead 860C display onto the working ebike to confirm that it is indeed the display which wasn't working and it didn't work on the known...

electricbike.com

 

[Peter.Bridge]

When you get your new one, it might be worth opening the old one to see what was wrong - pulled wire, water ingress, bad solder or whatever.

Instructions for opening and one fix here:

Bafang 860C display dead - Electricbike.com Ebike Forum

Hi guys, I've got an 860C display which appears to be completely dead. I've got a second ebike with an 860C display which works ok. I've tried swapping the dead 860C display onto the working ebike to confirm that it is indeed the display which wasn't working and it didn't work on the known...

electricbike.com

Thanks, I will take a look. You can buy the "handlebar mounted power +/- button pad" separately. I ordered the display and button pad but I will try just the new button pad to see if that was the problem. If it is I have a display spare !

 

[Peter.Bridge]

Thanks, I will take a look. You can buy the "handlebar mounted power +/- button pad" separately. I ordered the display and button pad but I will try just the new button pad to see if that was the problem. If it is I have a display spare !

This was the culprit, think there must have been a problem with the wiring inside the cable

 

[guerney]

View attachment 63739

This was the culprit, think there must have been a problem with the wiring inside the cable

Open it up? See if it uses bubble/blister type switches? Those wear out quite easily.

 

[sjpt]

Probably irrelevant, but worth 3 seconds of thought.
I have rare intermittent issues with the equivalent side button on my old Bosch with Intuvia display;
such as pressing '-' on the side button makes the assist level go up.
The problem is not with the side button itself, but the poorly designed contacts on the Intuvia display mount.

Just push and wiggle the Intuvia display almost always fixes it. If not, a quick wipe of the contacts always has so far.