Your multimeter is a versatile tool. But for certain diagnostics, you need an oscilloscope to get a closer look at a vehicle’s electrical systems.

Formal education teaches you theory and the real world teaches you the rest.
Just because it says “DOT 4” on the bottle doesn’t mean it’s the correct DOT 4 for the vehicle.
Inspection of a belt goes beyond the old standbys of checking for cracks and fraying.
The cabin air filter is arguably the most overlooked filter on the car.
It might be time to rethink oil changes.
Many vehicles today have made the switch to DC brushless fuel pumps. They don’t work like the older brush-type pumps do.
Your guide to understanding controversy and proposed legislation that directly affects how repair professionals earn a paycheck.
Failing to perform these two vital service steps could cost time and money—or worse.
Understanding how voltage is used in an electrical circuit can help your troubleshooting.
Brake fluid can wear out just like any other fluid.
Spark plugs have a tough enough job to do—don’t make it any harder by servicing them improperly!
Any of these mistakes can lead to an unwanted oil leak or worse—a blown engine.