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70+ Codes and a Total Mess!

OK, we admit, this one is a little longer than our typical resource reference. But, we really believe it is worth your time, as did many commenters on this post by Darren on Diag.net. As is often the case, this diagnostic tale starts with a

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Resources
Trailer Hitch Installed and Lights Go Haywire

We’ve all heard  horror stories about how add-on equipment can cause unexpected and hard to resolve problems elsewhere in the electrical system. Here’s a great case study where that exact problem happened and how the root cause of the problem was found and resolved. In

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Resources
Another Ground Gotcha!

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

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Resources
Module Swap Resource

So, this one isn’t about a specific fix, but about a class of information that can be very useful to shops and technicians in saving a ton of time and effort in the area of module swaps. We see many messages on the forums related

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Resources
Solving a Parasitic Draw on a Ram 2500

Here’s a very informative video by Justin in California, where he tracks down the root cause of an excessive parasitic drain on a 2019 Dodge Ram 2500 Big Horn. First, he lays out the customer’s complaint and the details related to it. He then reviews

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Resources
Great Scope Resource

We’re changing it up a little this month. So many of our past resource articles reference the use of a scope as a critical tool used as part of the diagnostic process. In addition, many of our feature articles are similar in that the topic

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Resources
Supply Chain Surprise!

This is a quick one, but one you’ll want to read if you find yourself diagnosing errors on vehicles built in the last two years. Gery from Florida ran across an issue (after several diagnostic steps) that appears to be a function of the unique

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Resources
Redeploying a Used Module – Do this First!

Many of our previous posts, whether in this category or in our feature article category, have noted the importance of having a diagnostic strategy. Often, this involves something along the lines of “Order of Operations” that we all learned in grade school math: if you

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Resources
Don’t Be Like Me

This month, we turn to Jeffrey in Illinois, who warns us to, “Don’t Be Like Me.” We love a good self-deprecating how-to piece where the author shows how they made a mistake and then teaches others to avoid said mistake. That’s reality and we’ve all

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Resources
Immobilizer End Run

This month’s resource piece provides some excellent information when you’re faced with a difficult vehicle that requires a key relearn but communications or other errors are preventing you from programming new keys. In the quick but informative case study on Diagnostic Network, Kevin from Manitoba

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