“While reading service information or an Electronic Service Manual (ESM), have you ever stumbled over an abbreviation or acronym and lost track of what was being said? Do not feel alone. It happens to all of us once in awhile. Wiring diagram abbreviations, sometimes called wiring diagram codes (or cell codes) in the older printed Service Manuals, can be especially confusing. Whichever system you are looking at in the ESM, you will find abbreviations or acronyms rather than a set of words repeated again and again. In this article we have provided you with a list of some abbreviations and acronyms and what they mean. Some you may have heard before and already know, but some may be new to you.
