VXOC Astra-J/GTC

Hi, does anybody know how the electric vacuum pump (for the brakes) is wired?

there are 2 wires (Red and Black) from the pump which go to a large connector block with 3 wires

what does the 3rd wire do?

I'd guess that red and black are live feed and earth, so is the "connector block" actually a relay and the third wire a trigger feed?

a wiring diagram may help if anyone has one.

the parts catalogue I've looked at shows the connector block coming with the pump assy



many thanx

I'll see what I can find later on TIS.

Hi thanks to Rusty for the diagrams, a lot to download but it seems that my assumptions were correct, the unit needs a 12v feed and an earth connection, the 3rd wire is a trigger to make the pump work, so I've wired this to a brake light switch so the pump operates when pedal depressed.
Oh it's not being fitted on a J in case you wondered, it's going on an old car without servo brakes, the J vac pump was the cheapest way to get vacuum for the retro fit servo without tapping into the manifold.