High Voltage Surge

[Dcolumbia]

14.5 is too high. if you are regularly running 14.8 then eventually you will burn up the batteries due to over charging. Your voltage gauge could be showing 14.5 but actually be charging less. always check this at the batteries. Mine would spike mostly while it was raining and they are all right, it was the voltage regulator in the alternator. Changed it out and now it runs between 13.5 and 14 always, no spikes. This did not start happening until I had the engine washed for the first time. Probably coincidental I am sure and continued doing it during rain storms for about 8 months until it finally annoyed me enough to change the alternator.