So I was doing some trouble shooting this weekend on my electrical system and i am lost. I was told to measure the volts at the battery and the alternator with car running and all my lights and fan on and see what the volts say. I have been having a problem with the volts dropping down past 12 volts. So I tested and I get 13.9 volts at the battery, 13.9 volts at the alternator and 13.9-14 at the horn relay with everything on. the guage in dash stills reads 12 volts and sometimes flucuates lower and higher. What the hell? I don't know where to look next. Everything is brnad new too. Any more suggestions? I also ran the 8 guage wire direct from the battery to the alternator and now when I taop the brakes the volts drop.