I got a new gauge in today with sensor. My old one was a signal wire an ground. The new Gauge I got has a 3 wire setup. I know one is signal, one is ground. I believe I am reading that 3rd wire is possibly a 5v reference?

 

there were no installation instructions with the new gauge?

 

could it be illumination?

 

I was thinking of that also, but that should have been too easy to figure out.....which is why I mentioned the instruction post above

Three wires would indicate one for sender, one for ground, and one for light.....if he tries to connect to a 5v reference wire, he might as well order up a new ECM and stop working on cars

Bryan

 

I am referring to to oil sensor. Not the gauge. I found out it requires a 5v reference

 

that's not what you said in your first post....

 

Well my bad. I will go to my safe space now. Along with my therapy dog.