I am in the process of fitting an outside light with PIR, i was hoping that i could just tap into the circuit for the light in my rear hall and add a double switch.Unfortunately i have encountered a few problems. The existing switch has only 2 wires (black and red) and an earth inside it, when i connectthe PIR light to the other side of the switch(i have run 2 small connector wires too between L1 and com) the light in the back hall goes dim??
Will i need to connect straight to the fuse board or am i wiring it completely wrong.
Thanks