Remote switch with wired transmitter 12 vdc

I a looking for a 12 vdc wired transmitter that will operate a remote on/off 12vdc switch.
I will switch the power to the transmitter

Hello Pre1952,
Welcome to our community and thank you for posting on our forum.
These were all I could find for wired transmitters.

Thank you for your inquiry.

See if something like this would work for you:
QUANTA-4S1 RF Solutions | RF and Wireless | DigiKey

Thanks for the recommendation. However I am looking for a transmitter that is actuated when a 12 volt current is applied. The transmitter then causes a switch to operate for a different circuit.