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.

Air filters are an easy service item to overlook, but most manufacturers recommend a new filter every year or 15,000 miles. Protect your customers from dirty air entering the cabin (and the stink of a filthy filter element) by checking cabin air filters on every vehicle as part of your inspection process.
The articles and other content contained on this site may contain links to third party websites. By clicking them, you consent to Dorman’s Website Use Agreement.
Participation in this forum is subject to Dorman’s Website Terms & Conditions. Please read our Comment Policy before commenting.