Alternator/Diode or weak contact issue??
Very similar threads to my problem, just no solid leads. I gave a jump to someone in need. The very next day while driving my voltage gauge spiked to 19 suddenly, check gages light came on. Continued to drive, few minutes it went off and voltage gauge returned to normal. Minutes later, spiked again. Immediately pulled into oriellys to have a voltage test done, revealing that my battery and alternator were operating normal.(I should note that my gauge had returned to normal before I had the test ran) I believe this is an alternator issue, but how or why? Since then, jeep drives all day everyday till yesterday. Wife drove and says spiked again, as shes parking it dies. Cranks right back up no problem but the clock was at 12:00. Any ideas guys?