Building Skills Performing Voltage Drop with Snapon DVOM скачать в хорошем качестве

Building Skills Performing Voltage Drop with Snapon DVOM

Embark on a journey through the intricate world of voltage drop testing with this detailed tutorial. We tackle two distinct scenarios: a one-ton farm truck facing a perplexing power loss problem under heavy loads and an International 766 gas tractor struggling with starting issues in cold conditions. Farm Truck Electrical Diagnosis: Initial Problem Overview: We start with a comprehensive look at the farm truck's performance issues, highlighting the challenges faced under heavy load and in colder weather. Fuel System Check: Suspecting a fuel-related issue, our diagnostic process begins with an examination of the voltage available to the fuel pump. Voltage Drop Test at Fuel Pump Fuse: Utilizing advanced Snap-On meters, we conduct a meticulous voltage drop test at the fuel pump fuse, uncovering unexpected findings. Ground Circuit Examination: Shifting focus to the ground side of the circuit, we uncover significant voltage drops that could be the root cause of the problem. Resolving Chassis Ground Issues: We detail the process of identifying and fixing a loose chassis ground connection, underscoring the importance of comprehensive electrical troubleshooting. International 766 Gas Tractor Troubleshooting: Problem Introduction: The tractor's issue is introduced - difficulty starting in extremely cold weather, despite a fast-cranking engine. Investigating Fuel Shutoff Solenoid: With a suspicion of a fuel-related problem, we focus on the electrical supply to the fuel shutoff solenoid. Voltage Drop Analysis: Employing a new Snap-On meter with a large display, we conduct voltage drop tests to identify any high resistance in the circuit affecting the solenoid. Pinpointing and Fixing the Issue: Discover how a corroded connection was found and resolved, illustrating the process of identifying and addressing voltage drop issues in older wiring harnesses. Key Takeaways: Learn the critical role of voltage drop testing in pinpointing electrical issues. Explore methodologies for diagnosing and solving complex electrical problems in both modern and older vehicles. Understand the importance of evaluating both supply and ground circuits in electrical diagnostics.