I have a car battery charger with high/ low switch and 4 LED's: 2,4,6,8 amp.etc I did something wrong connecting +ve to -ve or something, not really sure what. I would have expected the fuse to blow but what happens when it is switched on is all of the LED's come on . It is not connected to the battery.
What is it doing? is it kaput or can I rescue it?
Thanks
Brendan.