As cars get more and more technologically advanced, the number of applications one can do without a big, expensive handheld automotive computer seems to drop with every model year. However, for basic DIYers and shade-tree mechanics, a multimeter is just as important as a full diagnostic scan tool to figure out most problems. Those other tools can easily cost several hundred dollars, and a beginner will often never use many of the additional features and diagnostic applications they have available. A humble multimeter can measure many of the most common, and easy to repair, problems a vehicle can have.
As one gains more experience, there are a few tools one might consider upgrading to. A Power Probe, which connects to the car’s battery or another 12-volt power source, can make electrical testing far easier, as one can apply power directly to accessories with it while also performing a whole suite of electrical tests. Checking blower motors or other difficult-to-access parts is made far simpler when one can verify a bad part with the touch of a button.
A scan tool, often provided by most shops but available for individuals to purchase as well, is a worthwhile investment if one is getting into serious diagnostic work, or is looking to move further into the field of automotive repair. However, it’s a big investment, one not for a hobbyist to jump into without some thought. After all, as a high-end example, the Snap-On ZEUS+ diagnostic computer costs nearly $12,000.
