Help testing and figuring out the wiring for this slightly weird BBS01

tpw

Finding my (electric) wheels
Oct 14, 2018
15
0
30
#1
Bought this BBS01 from eBay the other day because it was cheap.

I want to test it just to make sure it's working, but I don't know what the polarity of the battery connector is (I presume that's the two pin one at the bottom in the photo..)

Would anyone be able to help me figure it out? I could cut into the wiring, but a) even if the wires are red and black I couldn't be sure they didn't just mix up the colours, and b) it would make it more difficult to return if it didn't work

I'm thinking I might have to disassemble the housing to follow the wires inside? But I'm worried that would involve disturbing some sealant or something

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IMG_0317.JPEG
 

vfr400

Esteemed Pedelecer
Jun 12, 2011
450
125
Basildon
#2
The three pin yellow one is for a sensor, so the three pins will be 5v, signal and ground. The battery connector is two pins, which will be battery positive and ground. You can therefore use a meter set to beep on continuity to test all combinations until you find the two grounds, which will beep. Once you have the battery ground, you know the other is the positive.
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
6,833
344
55
West Sx RH
#3
The Yellow Julet will be wheel speed sensor. Throttle and brakes are taken care of by the 1-4 trunk cable.


Opening/removing the controller to trace the wiring for polarity is quite easy, there may be a gasket seal in place but no harm is done by simply refitting.
 
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tpw

Finding my (electric) wheels
Oct 14, 2018
15
0
30
#4
Ah yes! Checking the grounds is a great idea, thank you

And thanks Nealh, I assumed those were the wire assignments, but it's good to have it confirmed.

Assuming it works fine, is there any preventative maintenance I should perform before fitting it to the bike, such as greasing gears or waterproofing? I know the 'B' version was supposed to have improved waterproofing, and I will definitely be using this in some heavy rain.
 

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