Hello, I am seeking information as to how the EPB system works exactly in these cars. I would like to retrofit these calipers onto another vehicle, which, due to poor design properties have high failure ratings and an aftermarket supply that is even worse. I plan to use these in lieu of the oem hydraulic system, similar to the setup in The Model S. Essentially, I need to know how the system works and/or need wiring diagrams. I noticed they have a 4 pin connector, which I would hope is as simple as: Power, Ground, and Motor Polarities.. But I need confirmation of this and I also need to know what voltage the system runs off of. I am about to purchase calipers, but would like to get some more information on the subject before I pull the trigger and possibly waste my time/money. If more elaboration is needed, please let me know. If you have anything to say, add, or ask.. Please do! Thanks!