elec vacuum pump

[malibujackson]

Trying to figure out how to wire up my elec vacuum pump it has
2 wires coming right out of the pump then up to a relay and to a pressure sensor, but cant figure out which wires coming out of the relay go to positive and the ground and the switch?? any help, anyone

 

[Supe]

Is it a standard bosch style relay?

If it is, then 30 is your power source (from battery or fuse block), 86 goes to ground, 87 goes to the + side of your vaccum pump (ground the normal ground wire for the pump), and 85 would be the switch. 87a (middle prong) goes unused.

 

[malibujackson]

ok sounds simple enough i will try it out in the morning.. thank you