Articles by G. Jerry Truglia

  Dealing with faults in the high voltage (HV) systems isn’t hard, but you do need to be aware of the dangers involved.
The problem vehicle that came in to the shop was a 2005 Ford Crown Victoria 4.6L V8 that had a complaint of being sometimes hard to start. 
  Even the folks at the top encounter problems every now and then. Leaders at TST this month share their experiences when diagnostics saved them in the bays.
So, you get a Mercedes C240 with this very common complaint: the cooling fan never turns off! Let’s say you are a little lazy and look up the problem in a repair database.
The customer called me with the complaint of his headlamps not working on cold mornings. He coupled this with an odd observation. He told me the rear defroster would act funny at the same time.
The most expensive fuses on the vehicle are any one of the several dozen computers found on a modern automobile. What happens when they replace the Electronic Control Unit (ECU) and the problem doesn’t go away?
Every vehicle has quirks about it. Some just have more than others. Check out these stories about higher-end vehicles, a BMW and a Jaguar to be specific, and the lengths these techs went to for a proper, accurate diagnosis.
This month, a couple of TST members take on problems from other shops and share their experiences with us. let's look at the issues with a 2002 Ford and a 2005 Subaru.
Let’s look at a couple of cases, starting with a troublesome Toyota Corolla and an “impossible to find” system lean DTC.
Diagnostic trouble codes (DTCs) can give you trouble, but they become easy to diagnose and repair with a good understanding of on-board diagnostics (OBD) II and scan tools. First, what exactly is OBD II? Well, if you remember what OBD I is, you can t