GM MOST Bus Diagnosis

We’re back with another extremely useful tip from GM Master Technician James from Florida, this time related to diagnosing GM MOST Bus issues. In this particular case, he had a 2015 Silverado with an inactive display. Using his knowledge of this system’s operating principles and the available scan data, he…

More BMW No-Start Fun

Last month’s iATN post was related to a no-start BMW that looked a lot like an EWS failure but turned out to be a faulty ground. In this month’s post, Jurgen from San Cristo’bal De Las Casas (Mexico) identifies anther common no-start culprit in a BWM wake up circuit, the…

Solving a No-Start BMW

In our feature articles referencing expert advice on diagnostic strategy and success, we see several common components or guidelines that are repeated over and over, regardless the author/expert. These include having a clear diagnostic plan, following where the data/information points you and always checking for good grounds in the affected…

Replacing Chrysler PCMs

Chrysler PCMs and the intricacies of programming them can be a tricky business. In this month’s iATN spotlight, Michael from New Jersey provides tips related to used PCM calibration that could save you some time and money. As he notes, “the programming is a one way process; once programmed to…

Intermittent LAN Failure

Last month’s feature article focused on finding and resolving intermittent failures. This month’s iATN post is a follow-up of sorts. iATN rock star James from Florida provides a case study of sorts related to identifying the cause of an intermittent system problem, tracking it back to a LAN issue. In…

Trailer Wiring Tip

In this month’s post, Steve from South Dakota addresses a common source of later electrical problems – connecting an aftermarket trailer. In his post, Steve shares a great tip related to wiring a trailer to a Chevy Traverse in a way that makes it work “as if the vehicle came…

Is the Alternator the Issue?

In this month’s post, Louis from New York provides a diagnostic routine to quickly determine if an alternator is bad and “know for sure without messing around.” He uses the case of a 2014 Grand Caravan with 54,00 miles and a suspected failed alternator (wasn’t charging at all, and no…

Wipers Run Constantly

In this month’s post, Todd from New Jersey provides a tip that combines several of our favorite topics: having a plan when conducting electrical system diagnostics, the importance of good grounds and using voltage drop as a key diagnostic tool. In this instance, he used these methods and more to…