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24.8 volts on both sides of the splice.

Ok, so I checked all connections and they seem to be good. I checked the battery cables and there are no bare wire spots to cause a short. I disconnected the batteries and removed the alternator to clean all the connections. I broke the quick connect plug on the small wire going into the cover...

I will also add that my truck only has two batteries that were put in new by the previous owner. The only thing electrical that I have done is replacing a few dash lights. These things are minor but thought I should add as much detail as possible.

I will do that but the issue is that while in idle the gauge stays consistent. It only fluctuates while driving. I will report what I find regardless.

The TMs don't really seem to cover this issue but here goes. My voltage gauge has always stayed toward the bottom of the green section no matter the temperature or speed I am traveling. Yesterday I noticed the lights seemed to dim a little for a while then get bright again. It repeated this...