chuckd,
I have a 2002 31-foot RK unit. It is similar to yours but I have a 30 amp service. From your comments, I am guessing you have a 50 amp service.
My surge protector is a gray box mounted to the right of the circuit breaker box. It is called "Intermatic" Panel Gard. My Model is IG1240R. Their web site is:
WWW.INTERMATIC.COM
With my 30 amp servive we have only had one green light lit since I bought the trailer. My light is lit on Line 2. Line 1 is off as usual. I believe if you have a 50 amp service and both lights are lit under normal circumstances. (However, that is just a guess).
If my "guess" is correct, then one leg of your service is having trouble.
I hope this helps.
After about one year of use on my trailer, I started having trouble getting adequate power to the trailer when I tried to operate near 25 amps. I was able to solve this problem by dismantling the plug where it attaches to the trailer. Some of these fine wires had broken from the flexing and the screws were loose. I reworked this plug and power has been O.K. since.
Good Luck, Don