wiring info - Printable Version +- VXOC Astra-J/GTC (https://vxoc.org.uk/forum) +-- Forum: Astra-J/GTC Section (https://vxoc.org.uk/forum/forumdisplay.php?fid=5) +--- Forum: Request for information (https://vxoc.org.uk/forum/forumdisplay.php?fid=24) +--- Thread: wiring info (/showthread.php?tid=4606)

wiring info - niteram - 18:th-Apr-2020 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 RE: wiring info - Rusty2009 - 22:nd-Apr-2020 I'll see what I can find later on TIS. RE: wiring info - niteram - 17:th-May-2020 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.