GFI light stays lighted up won't go off worked fine forever just started doing it So I bought a new one and replaced it but it didn't solve my problem also it doesn't trip the Breaker its running on So Should I try replacing the breaker anyway with a new one too see if that so les the problem what else could it be I'm puzzled?

It doesn't trip the breaker?
Are we talking about GFCI receptacles?
Do the instructions explain what the "light" indicates?

Doing electrical work without a voltage tester leads to guessing.

You need to check voltage at variois points, beginning with the circuit breaker, and follow it to the device that is not operating.

Otherwise, you are just changing parts with no idea of what is defective.