1. Welcome to PlowSite. Notice a fresh look and new features? It’s now easier to share photos and videos, find popular topics fast, and enjoy expanded user profiles. If you have any questions, click HELP at the top or bottom of any page, or send an email to help@plowsite.com. We welcome your feedback.

    Dismiss Notice

2000 Dodge Ram 2500 5.9L Gas Alternator Problem

Discussion in 'Truck & Equipment Repair' started by RefinedPS, Dec 29, 2011.

  1. RefinedPS

    RefinedPS Senior Member
    Messages: 131

    My alternator keeps reading zero when the engine is idling. I have had it tested and it checks out ok. Could it be a battery problem? I'm not sure what the problem is. :realmad:
     
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,930

    does it start ok?? do you have a meter you can check the voltage at the batt, running and not running?
    check the voltage at the cig lighter?
     
  3. RefinedPS

    RefinedPS Senior Member
    Messages: 131

    I do have a meter, I will check when I get back home. It does start ok. It seems like the alternator is bad, but it tested ok. :help:
     
  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,930

    well if your truck is staring ok,,its almost impossible for the gauge to read 0.....if your battery is that dead it wont do anything when you turn the key on. i'm kinda leaning towards gauge issue or wiring to the gauge. not uncommen for the gauges to go bad
     
  5. RefinedPS

    RefinedPS Senior Member
    Messages: 131

    I noticed that the lights do dim with lower rpms and get brighter with higher rpm. Would the alternator be going bad?
     
  6. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,930

    could be,,did you test the alt on the truck?
     
  7. leepotter

    leepotter Senior Member
    Messages: 122

    Belt slipping?
     
  8. cwby_ram

    cwby_ram Senior Member
    Messages: 907

    I'm with dieselss. Sounds like a gauge thing. I once replaced an alternator on one of the mowers ($300), and found that in reality it was a bad wire ($0.03). Anyhow, I'd say get your readings with the meter and see what they say. Maybe charge your battery up over night real good once, just to rule it out.
     
  9. RefinedPS

    RefinedPS Senior Member
    Messages: 131

    Well after having the alternator, and battery tested, cleaning all the ground wires, and charging the battery. Turns out that the guy at auto zone didn't know how to read the tester when he checked my alternator. I had it tested again after my truck completely died, and snow coming down like mad. Sure enough, bad alternator. $150 later and I'm up and running again! :yow!:
     
  10. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,930

    well good/bad i guess, Me personally never trust auto zone. always test on the truck. now check the battery as well. it might have been drained to bad and might not be totally up to specs anymore.