I'm new here and joined because i've got a 2002 2500 Cummins 5.9l with 210000 miles. it's been a good truck, but things are starting to go sideways, so this looked like a good place for advice.
Here's my latest headache.
I was driving and my 'Check Gages' light came on, at which point the voltage meter bottomed out at 8 volts. nothing else happened from what i could tell. radio, lights, fan and accessories were still working, and the truck was running fine. drove home 2 hours, started next day and drove to work. At start up, the voltage meter read 12 volts+/- but after a couple minutes driving it did the same thing as above. I checked batteries and were 11+ volts, not surprising as i ran 2 hours day before, so i put em on a charger. So i started truck and checked to see if the batteries were getting charged from the alternator, and they appeared not to be, i noticed that a bolt for the alternator bracket had pulled through the housing of the alternator, so i replaced the alternator with a new one.
Here's where i'm baffled, after replacing the alternator, i started the truck and the voltage meter went to 14 volts, and a check of the batteries confirmed that they were getting 13+ volts, so i figured i had it fixed. several hours later i had to go somewhere, and started the truck up, it did the same thing as before
, I cleaned up the battery terminals and cables and still same thing.
I'm at the end of my electrical trouble shooting skills, so any advice would be greatly appreciated.