[bigblock261]

Volts.

To measure voltage drop would I be using the ohms setting still? It is a cheap multimeter and the directions are less than one half page in length.

No, DC volts. Place the leads at either end if the item for which you want to know the amount of voltage drop.

I had a negative battery cable terminal that sometimes got warm to the touch. I set the meter to DC volts, put one lead on the battery post, the other on the cable terminal 1 inch away. Had someone crank the engine, 4.6 volts drop. I expected 0 volts, heck it's metal on metal.

Cleaned the terminal, which looked perfect, but I cleaned it anyway. Then 0.1 volts drop, cold to the touch. Corrosion is resistive, and that's bad.

A multimeter is handier than a pocket on a shirt.

 

[bigblock261]

Current.

Be careful measuring current. Many digital multimeters are rated at about 10 amps DC, which is easy to exceed, and will pop the internal fuse.

As you know, the meter must be in series to measure current, meaning a serial part of the circuit, and not just touching the circuit with a test lead.

You could measure the output voltage of your many personal device battery chargers, or the DC batteries of an UPS if you have one on your TV or computer.