The switch wire harness is not included the pump ,It have braket and hardware, vacuum pipe,switch, relay and wiring kit. All wiring pre assembled for easy installation,you could easy to replace your original pressure and relay and wire.
Rotary Vacuum pump switch kit w/ relay,wire harness fit for EVP28
Electric Rotary Vacuum pump 12 V - Brake Booster Vacuum Pump - "Plug and Play"
Brake Booster Rotary Vacuum Pump kit , Stand alone
12V Brake Booster Rotary Vacuum Pump kit -UP50, "2 WIRE " Quiet and hi powered