Thanks countspatula for the reply.
Here is a video showing how it is possible to add a light to the foot pedal and still use the foot switch and the two connecting wires to activate the Trap functions normally without the use of a microcontroller:
Just for reference.
How it works:
The video shows a 1K resistor in series with the LED and a 470 ohm resistor in series with the normally open switch.
The 470 ohm and switch are in parallel with the 1k resistor.
If the 5v relay has two sets of contacts DPDT, one set of contacts can be used to Latch the relay
ON after the pedal is pushed, while the other set activates the internal SFX.
Then after a delay of a second or so, the "latch" can be cleared until the next time the foot switch
is pressed. The latch will also work if the signal to the LED causes it to flash.
As soon as the relay gets the signal from the foot switch to activate, it will latch for a second, then go back to flashing.
Just thought this might be of some interest to you :^)