Shimano Steps power brick - 4pins (how to check working condition?)

[gronn-overledning]

I dont have the bike. Just want to check if its working.
No voltage on either 4 pins.

Do I have to short something to activate, or is it just dead?
(how to short some of the pins, to activte the voltage...?)

Thanks...

Shimano Steps charger SM-BCE60
https://duckduckgo.com/?q=sm-bce60++shimano+steps+psu&iax=images&ia=images

Connector
https://greatebike.eu/uploads/products/3098/big/nabijecka-shimano-steps-sm-bce60-1.jpg

[m k]

Many times chargers have a battery temperature check, that's one or two pins.
Tall one is probably GND.

You can connect a dummy load between charge pin and GND, but there can be a current problem.
Your dummy load must survive the startup current.

It's also possible that initial battery voltage must be present.
There the idea is that only healthy enough battery is charged.

Nowadays its also possible that charger and battery have embedded MCUs.
In that case you're pretty must out of the loop.

charge pin
 |
resistor -<- diode - voltage source
 |
GND                      GND

temp +
 |
resistor
 |
temp -

[gronn-overledning]

Thanks.
By trying to short the two middle pins and "feeding" 30V DC on the charging-terminals, i got the output to make 40V in short "blinks".
Could not make it 40+V stable, but the orange LED blinked also....so I guessed the PSU was OK.

Made an sales-ad, telling about my testing, and got it sold for an OK price, by someone having several chargers/batteries.