I measured Terminal 1, and the reading did fluctuate from 14ohm to 6ohm.
If this is true, you shouldn't power on the amp. On the other hand, I would go back and recheck these readings. Does a "K" or an "M" pop up around the number when you take the reading? This would indicate 6,000-14,000 or 6,000,000-14,000,000 Ohms respectively, which is a lot different than 6-14.
Terminal 3 got 0.5 ohm which I thought is also okay.
No problems there.
But for Terminal 2 the reading stayed at the initial fixed reading of 1 and did not fluctuate. So kinda worry about whether Terminal 2 is okay?
You might be over the limit for the range on your meter. Can you let us know which meter you have? Some are autoranging, and some will have scales (something typical would be 200 Ohms, 2K Ohms, 20K Ohms, 200K Ohms, and 20M Ohms). If you are on the 200 Ohm scale and trying to read 1000 Ohms, you would get something that might say "OL" or just have a "1" to let you know that you're out of range.
-PB