I have found a partial solution to poor connectors-- "Stabilant 22" a true 'space-age' polymer made in Canada and repackaged by Borg-Warner for retail sale as "CL-85", available (usually by order) from any parts store that carries or can get a B-W product. This magic solution costs about $50 for 15 ml of a 20% solution of Stabilant-22 in iso-proply alcohol, and only a very tiny amount is needed for each contact point. It works by creeping into the minute crevices of a normal connection, sealing out water and attendant corrosion, and actually vastly improving the electrical conductivity of the connection. It is a electrically conductive polymer that acts as an insulator except in the high current micro-contact points of the connection.

CL-85 will vastly improve the electrical performance of even very high quality gold-plated aero-space and computer grade connectors. Most every Xerox tech that services their high-end stuff, every IBM main-frame hardware tech, and every US military electronics tech uses the stuff now. Why it is such a hidden secret in the automotive field is a mystery. High end video and audio production shops are using it more and more, and SOME speciality 'electrical/electronics guru' automotive shops have it. It is THE ANSWER for problematic connectors--ABS connections, ETA's ALL the computer board connectors,etc. Anything that has to have a clean signal, low/no resistance, 100% reliable no noise connection should have this solution on-it.

Borg-Warner CL-85 is THE ANSWER to all those crappy connections.

Other parts houses have different numbers as shown below
NAPA-Echlin CE-1
Borg Warner CL-85
Neihoff NL-5
Auto Tune PT-796
Parts Plus CL-85
UAP-NAPA CE-1
Car Quest SL-5
Big-A 40-6
Kragan Auto Pts Lub5 or SL-5
Checker AP SL-5
Shucks "
Grand Auto "