abs pump
I think if you leave the plug of the pump will run all the time as when I first wired it up I did not have the pressure switch wired in and it ran all the time.
To make the pressure switch work if its a made up loom it would have to have a relay in it so that the when the switch worked it switched the relay and then switched of the supply to the pump. If the pump is switched through the p switch it could damage the switch.
I cant remember with out looking which 2 terminals are the switch but if you need to know I will look tonight for you. I think I still have a rough wiring diagram of how i wired it, as some one on here asked me for one if you need it but I did not use the plug.
If I remember right when you bleed a cossys brakes you bleed the front as normal but you put the pump on for the backs so when the pump is runnig all the time it might pressurise the backs more but im not sure about that.