Brad, when measuring voltage drop, "nothing" is good. You do need to make sure you're getting a good contact with your probes, which should be obvious as the meter display will settle down when your probes make contact. If there's no voltage drop, then the meter should show only a few millivolts.
If you can get the lights to pulsate at idle, I'd check the positive voltage at different points: the battery, the alternator and the lights themselves. Always use the same ground, preferably the negative battery post. I expect you'll see the voltage fluctuation everywhere, but if you don't it will give you a clue where to look. If you DON'T see any voltage fluctuation, the the problem isn't in the charging system; more likely a bad lighting ground.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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