300ZX V6-2960cc SOHC Turbo (VG30ET) (1984)
Fig. 130 Connecting battery to fuel pump terminals.
9. Disconnect fuel pump connector and apply battery voltage according to illustration.
Vacuum/fuel Pressure Test
10. Start the engine and read the indication of the fuel pressure gauge as the vacuum is changed.
NOTE: Fuel pressure should decrease as vacuum increases. If results are unsatisfactory, replace fuel pressure regulator.