Graham is quite correct.
Turns out that it does take it's supply from the RX 😮"
That was my take on the 2A switch Rob.
"Perhaps use the two Turnigy's for the lighting circuits and the Orange one with a relay and separate supply for the pump? "
Orange one? I must be going colour blind.🙈
Anyway, I would suggest using the two switches shown by Mike as follows-
I would use the 10A switch for the pump, which apparently takes 2A max, and the 2A switch for lighting.
I assume the lighting will be LED chains which will only need a few tens of mA per circuit. The RX battery / BEC will hardly notice that.😉
I don't see any way to use the 2A switch with a separate load battery without modifying it, difficult, or damaging it☹️
The output wires of the 2A switch DO need to be connected with the correct polarity or it would probably destroy the output switching transistor and possibly short circuit ⚡the input supply from the RX, thus maybe killing the whole system.
---> 'Dead in the water'😭 Pack your swimming trunks and a beach towel Mike!
The input and output - wires are common!! The output having a black tracer on the - lead. I.e. you can't wire it like the Turnigy switch.
That's my 'Chip' Rob, hope it helps you Mike.🤞
Cheers, Doug 😎
BTW: What I miss in both so called specs is a latching mode. Which is why I like the Action switches. You can set them to latch / unlatch or to only be ON when the TX switch or stick is activated.