Here’s an anti-long resource piece for you (fully halting our streak of long to longer resource articles). This one, from Andrew in Utah, is definitely the shortest one we’ve ever referenced. It’s also a good reminder. MOST bus connections (which can very from fiber optic connections to copper connections) are temperamental and require extra attention and care. Here, Andrew shares his approach to keeping copper MOST connections in good condition.
Ed. Note: There was much debate in the comments of Andrew’s post regarding what type of connections are involved in MOST bus configurations. It seemed rather spirited, with strong opinions on all sides. For those of you who aren’t Diagnostic Network members, I’ll share a little of Martin Smith’s (Instructor, BC Institute of Technology) comment regarding the use of copper connectors in the MOST configuration for some manufacturers: “GM vehicles 2014-2020 with MOST 50 use copper conductor… Terminals are subject to vibration, heat expansion cycles and exposure to conditions that can result in what look like dark marks in the contact area of the terminals, breaching/scuffing the coated surface. Microscopic corrosion develops and if not caught early enough, cleaned and coated with a preventative material, the oxidation returns…Unless caught early on, terminal replacement will ultimately be required to prevent the condition from recurring. Cleaning and lightly coating the terminals with the dielectric lubricant allows the terminals to move without scuffing of the surfaces. The dielectric grease prevents elements that cause oxidation from entering the terminal.”
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