Thanks.
Hi you can just separate the two with the original connection left plugged in I have always done this in the past as some of the cheaper units have had problems with the electronics in the drive motor, I have been thinking very hard on this and have another possible solution, when you said the calliper was binding did you mean that the wheel resists being turned by hand with the car jacked up and no parking brake?, if so check the following before condemning the calliper, there are slider pins on the top and bottom of the unit these are in a rubber boot assembly, retract the the EPB and take the securing bolts out, with the calliper clear test the movement of the pins in the rubber boots there should be very little resistance to you pulling them in and out, if there is chances are the pins are dry or worn and will hold one side of the pad set on normally the piston side, repair kits are plentiful and cheap, the other consideration is how long have the old pads been in situ as I have found through experience that on cars that only do average milage over years the pad location runners tend to corrode to the carrier so the piston side wears faster as the crud on the outer runners prevent the outer pad from pulling in as much so its all on the piston side, so worth stripping and cleaning as it may well cure your problem without the need for a new calliper, brake fluid change highly recommended.
Steve.