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TRNW's Diagnostic Help Database is a great source of information when diagnosing those tough electrical problems. A complete list of OBD II Diagnostic Trouble Codes as well as manufacturer specific codes, code descriptions, diagnostic routines, wiring diagrams, and connector pin-outs. The layout of the TRNW Diagnostic Help Database is designed with the technician in mind. While diagnosing a problem, you will have one-click access to the wiring diagram and/or connector pin-out in question. No other publication makes electrical diagnosis this easy.

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