Hello all.  The other day I came across a RadWagon for sale on my local Facebook Marketplace. I have been buying and fixing up regular bikes during the Covid Pandemic as a hobby, so I was interested.  I also have an Ejoe Koda e-bike that I really enjoy.  Anyway, I went and checked out the bike.  They were asking 200$.  They said they bought it as a project and the previous owner said it needed a new battery.  They never did anything with it.  I decided to take a chance, since I figured there were more than 200$ worth of parts if I ended up not making it work.  It has a suspension seat post which I see retails for like 80$, so there's that right there. 

I got it home and started cleaning it up, it was really dirty and scuffed. I found that Magic Eraser sponges really cleaned up the scuffs.

Untitled by mikesova, on Flickr

It was during the cleanup that I discovered the bent fork.  I should have noticed it before, but it looks like it has been crashed and bent back a little.  I know that bike shops have fork and frame truing jigs, so I'll look into that before looking at buying a new fork. I spun the wheel before purchasing and it was true, so those heavy duty spokes must really work. 

Untitled by mikesova, on Flickr

Untitled by mikesova, on Flickr


So, I also tried to charge the battery when i got home. The bike didn't come with a charger, but I already had one for my other ebike. The battery didn't seem to take a charge.  I thought I would do a little investigating, though, the battery box is really broken and seems to have been modified so that the battery is directly wired to the pigtail that normally comes off of the battery holder.  It was pretty easy to take apart since most of the screws were broken off. When I took it apart I found that a 5amp fuse was blown that was inline with the charging port. I put a 3a fuse in that I had laying around and boom it started charging. Cool!

After charging, it shows a full battery on the display, I also have a little meter that I hooked up and it showed it having 54ish volts.  The battery may still be good. That would be sweet.

Untitled by mikesova, on Flickr

Untitled by mikesova, on Flickr

The battery could really use a new box.

Untitled by mikesova, on Flickr

Unfortunately, I can't test the battery, because I've got the "Error 30 Maintain" issue.  So it sits like this right now.

Untitled by mikesova, on Flickr

I have a few questions for you all. 

1. I checked all the connections on the bike, they all seemed pretty good except for the connection between the wire harness and the controller.  It wasn't bad, but there was a very little bit of green corrosion in it.  I took a paper clip and scratched the inside of the female connectors to try and clean it up.  I also sprayed a little brake cleaner in it and then some wire electrial corrosion inhibitor.  Hooked it back up, still have the error code.  Can I have everything unplugged from the harness except the display/controller/motor and have the bike stay on? I'm just trying to isolate the issue.  My intuition is leading me towards the controller.

2. Anybody have a spare stock controller that they know works, but upgraded to a different controller? I'd be interested. 

3. Anybody have a spare fork? 

4.  Anybody have a junk battery with a good enclosure?

Thanks for joining me on this project.