The Isolation relay kit is good for keeping 12V + from feeding back into a low voltage signal input or logic input that require a Ground only signal. Can be used with the TCM420, TCM430, TCM432 or any of our controllers to give a ground signal when the signal source has 12V on it such as a Brake Light circuit.

Includes: Relay, wire harness and full color instruction.

Note: This kit is wired with 20ga wire and not intended to be used to power a high current load like cooling fans.