I went to my local Cummins dealer today, they work on big rigs and RV's. I got better info from them in 5 minutes than anywhere else. I described the simptoms as I stated in my posting and they told me it sounds like a battery problem. I brought the battery in for them to test and sure enough it was only getting 7.9 volts under a load. So I replaced the battery and now I'll wait to cold weather hits to see if that was the problem. The guys was quite confident that it was. So we will see.
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