Oil pressure idiot light stays on

i run a oil pressure gauge because i like knowing what it is doing and if there is a problem i know right away. i also been running the oil line from motor to pressure gauge for many years with never an issue one time

when i first changed out my motor my buddy pinched the sender wire and grounded it out and the light stayed on all the time and then the light went out the second i found the problem and un pinched it