After describing my concern below, Do I have a problem or not?

2003 DODGE RAM
138,000 MILES
Avatar
SANDPLUNN
  • MEMBER
  • 1 POST
I have a 2500 Ram with a 5.9 Deisel. I thought I had a charging problem and thought it to be my alternator because both batteries were only 2 years old. The alternator checked good and it turns out that the primary battery was bad. I changed the battery and still have the seem indications on the charge meter.
When I turn the key on the volt meter goes to just UNDER 14 volts. I thought it used to go just OVER 14 volts. In any case, when I start the truck the meter stays slightly UNDER 14 volts. Within 5 minutes the gauge goes up to slightly OVER 14 volts and stays there.
Do I have anything to be concerned about or is this normal operating and I have just forgot what i thought I used to see.
Thanks
Dec 12, 2011 at 9:58 PM
Advertisement
Avatar
CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
Dash gauges are never real accurate. Use an inexpensive digital voltmeter to measure the battery voltage while the engine is running. If it's between 13.75 and 14.75 volts, the charging system is working properly. Be aware that on diesels, it's normal for the voltage to drop below 13.75 volts intermittently when the air heater cycles on.
Dec 12, 2011 at 10:09 PM
Avatar
WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
You are also charging 2 batteries at the same time so it may run a little lower.
Dec 12, 2011 at 10:38 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.