Should the two batteries on my ford diesel be showing the same voltage?

I have a 1990 Ford F250 7.3 diesel with two 65S Everstart batteries. One battery is showing about 13.5 volts when running. The one by the voltage regulator is showing about 14.5 and when I rev the engine it goes up to 17 volts. Is this the way it should be? The alternator and the voltage regulator are brand new put them on yesterday.Should the two batteries on my ford diesel be showing the same voltage?These batteries are wired in parallel they should be exactly the same voltage! If they are not that means that means that you have a resistance at one of the terminals or you have excessive voltage drop in one of the cables! You need to check the terminals and your grounds! What in the world is tronary talking about? 13.5 volts is a fully charged battery? If it has a separate regulator 17 volts is OK? WTF??? A fully charged battery (with no surface charge) is each cell produces 2.1 volts times 6 cells=12.6 volts! Ideal charging system voltage @2000 RPM (the RPM that it should be checked at) is 13.8-14.6 volts! You cannot take a reading at idle, alternator output is measured at 2,000 RPM (if you read voltage at idle it WILL be inaccurate Did you check anything that i wrote yesterday?Should the two batteries on my ford diesel be showing the same voltage?
Do you have a battery isolator ? If so check the connections for corrosion . If not then you need one. The batteries should read 14.5 volts at idle. The 13.5 reading is a fully charged battery. If the voltage regulator is separate from the alternator then 17 volts from alternator would be ok but it must not exceed 15 volts leaving regulator. If you did not clean the battery terminals and posts do so. A new battery still needs posts and terminals cleaned.Should the two batteries on my ford diesel be showing the same voltage?all good one will be slighty higher since its closer to the source ,the voltage goes up when revin means alternator is working ,heres a tip to see if the alternator is charging put a magentic on the back of the alternator bearing seal if it sticks its goodShould the two batteries on my ford diesel be showing the same voltage?
they should be so very close. if voltage is jumping up that high, there is a problem.Should the two batteries on my ford diesel be showing the same voltage?If there above 12v then no there no problem