With the engine off remove the vacuum hose from the fuel pressure regulator on the end of the fuel rail.
If fuel comes out you need a new one.
There are a couple of different ones, pretty sure all the turbos are the same. Good Bosch one will be $200 new. Good second hand one will be $80 or so.
The fuel pump switch was probably installed due to a failing fuel pump relay. May be prudent to have it looked at and the relay, assuming it is broken (they all brake) replaced.