Thought I had 3c shielded in the wing to the tip... I did. But inside fuselage it is 2C shielded. Must change over in the wing root. Going to order some 3C shielded and run a new lead from the fuselage to the tip. Should work out OK. Made up all the molex connectors...might have to re-pin the ones on the tips. Garmin OAT need 3C plus the shield wired in. Old AFS was 2C plus the sheild ground. Seems like a double ground to me, but I will follow the manual. You don't know what you don't know!