Stromer Electronic Troubleshooting Guide incl Wiring diagram for ST1

[JP Stromer ST1]

Having NO_COM or NO_BATT error.

Here are the Step by Step Stromer Electronic Troubleshooting Guide incl Wiring diagram for ST1

 

[opimax]

I have a no comm error , I need a display to test the bike , no where to get /borrow to test...

 

[fxr3]

Thank you. That’s the way to join a forum!
Maybe there is hope for the world. I just shorted out lights on st1 preparing it for sale, now maybe I can figure it out.
And, of course, you don’t happen to have same for the others?