T-LO, I'd like to help but I'm finding it hard to figure out what you have exactly. A Schoeps mike capsule, such as the MK 4, doesn't have any wires. Maybe you have a pair of complete Schoeps microphones that have MK 4 capsules? If so, the bodies of those microphones should have a type such as CMC 5-- or CMC 6-- engraved on them. Yes? No?
Also, when you say "wires" I don't know whether you have an active cable between the capsules and the mike bodies, or whether you attach your capsules directly to the mike bodies (amplifiers) and you're talking about XLR microphone cables that may be loose, or connecting in an unreliable way to the microphones.
Could you please try to be very clear about what exactly you have, and where you think the problem may be? Thanks.
--best regards