Well, we don’t mean to beat a dead horse here, but this is another great resource piece that hits all the highlights of successful electrical diagnosis: the need for a sound understanding of system operation, the importance of having an accurate wiring diagram and (you guessed it!) the importance of good grounds.
This month’s installment is a detailed case study by Shane in Massachusetts. Here he tells the tale of a Chevy Silverado with a u0107 code and a bunch of strange, apparently unrelated symptoms. He was the third (at least) technician to try to resolve the problem, with a tale of woe before he finally solved the mystery. In his case study, he walks right through his diagnostic process, explaining why he pursued each successive step. It’s a good read and one that might save you a bunch of time and hassle down the road:
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