I’ve recently purchased 2 K2599 kits, and built one myself, the other was built by a friend completely separately.
On both kits, when 12v power is applied, the LED activates and a relay clicks. Nothing further happens, however long I wait. The same happens on all 3 switch positions. Removing power makes the relay click again. We’ve tried both 12v battery chargers and a car battery and have the same result with both power supplies.
Have you any thoughts or suggestions? Thanks
And kit #2 (we removed the diode to check if fitting the other way round made it work):