How to test a bad / good ground wire on my car?

Question

How do I test a ground wire on my car?

Answer 1

goto a parts store and buy a test light. it loooks like an icepick with a light in the handle. it should come with instructions. maybe 10 dolllars or less.

Answer 2

Get yourself a good DVOM (digital volt ohm meter) and take one lead from the meter and attach it to one end of the wire and the other lead to the other end of the wire.  Set your meter to OHMS and read the display, anything over 1 ohm resistance is bad.  Granted there is resistance in the meter internally and leads but it should be nothing more than .2 ohms.  When in doubt, touch both meter leads together and check the resistance.  Subtract that value from the resistance from the wire, and there is your total resistance in the wire.