K2543 doesn't work. How to test it?

Kits Automotive projects
1

Hi,
soldered two k2543 kits for my motorbike. After installing everything it only runs on one cilinder. Checked the cables, power, ground… capacitators are off. Cilinder will work without the kit and the capacitor. The other one works just fine. Everything is clean soldered. How can I test this kit?
Thx fons

2

You can simply test it using a small lightbulb instead of the ignition coil.

3

Thanks for the reply. I was wondering if there were any definitive values i could measure on the print itself, since it wasn’t working, whether to find any faulty component. I’m aware that the cost of this kit is too low to do any critical repair. But if i had any clue what could have gone wrong, i would be sure not to reproduce this fault on a 3th kit.
The kit is too simple to make critical mistakes. Everything is soldered in a proper fashion and in the right way. It was installed properly. No false contacts between heatsink and ground. Yet it does not function.
thx