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Cables
Ok - got it. I do not have the Pennycap, and the wiring diagrams I have to do not detail out the type of coax - sorry. While I have no experience on Cessna Pennycap system, I have worked on many aircraft with capacitance type systems, and my original post regarding the ground is just as important. The only time I have seen the need for the harness/cabling to be replaced is when there is a break or physical cut in the harness not at a connection point - I would be very surprised if that is your problem.
Checking all connections for continuity and presence of shorts to ground is the first thing to check. Typically, the oil on a connector, unless so thick that it somehow provides continuity between two connection, should not impact the indication system where it takes it to Zero indication.
The cable shielding is split at each connector (pin 2) at the wing to fuselage connector, and of course at each probe connector. You want to ensure all those connections are good, with no open circuits or short to ground on center wire or shield wire. If everything went to zero, it really sounds to me like an open or short in the circuit - for what its worth. Checking all the connections is time consuming, but inexpensive troubleshooting than replacing the cables.
If all your cables check out, look at what is common to both sides as well; power source and main control monitor. Could be something else failed at the same time you had the ACF done, just by coincidence. For example, if you have power to the control monitor - is the ground okay (pin 5)?
Jeff
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