you cant do it with that switch.Just been searching through the forum and came across this thread.
I’m wanting to do exactly the same thing with my van but have a slightly different switch.
Can anyone give me some advise for wiring up instead of the switch mentioned above
Thanks
View attachment 146160View attachment 146161
the above switch is ON-OFF-ON style switch.
the one you show above is ON-OFF (with a GRND for the LED to light when ON) - so its just ON-OFF from either power source, but not both.
.