Before using those inexpensive colored clip leads when working on your car, you must do this simple test to see if they are made with fake copper wire.

Using a four-wire scheme requires unusual alligator clips that don’t electrical ... the resistance of the test leads get tangled up in the measurement. With four wires, one pair of wires is ...

However, if you look for a “test lead kit,” you’ll find many options for about $20. One kit had interchangeable probe tips, alligator clips, spades, SMD tweezers, and tiny hooks for IC legs.