I use dielectric grease on all wire connections. It has drastically reduced the number of failure in the connection. The conductivity occurs through the metal to metal contact, which the dielectric grease does not reduce, and not through the air in which corrosion happens, which gets filled with the grease to eliminate this corrosion.
It is especially helpful in moist or wet conditions where corrosion is accelerated.
2017 Escape 5.0 TA (someday soon, I hope
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln