Engine bay switched 12v power

[Stl-986]

run a wire to the battery, connect it to a relay and then trigger the relay by ignition. Put a 5amp fuse in line from the battery. Output from the relay goes to your sensor and then connect sensor & relay to ground.

Without knowing what exactly it is I wont recommend anything else cause the risk of causing other issues can be too much.

[jaykay]

https://drive.google.com/file/d/1S79VSwt4LsVELBgBW-aCW3dJ9PFssLkT/view

here is an example of the module(s). I am not sure how it would help. The power requirements are as I have stated.

running a wire from the battery would be out of the question. we need a source in the trunk or engine bay