Dodge truck battery drains overnight. new battery installed

It would seem as though you have a drain somewhere in the electrical system.

A faulty alternator can cause a battery to drain - sometimes - within minutes. It's the rectifier pack - the diodes in the back of the alternator which burn out.

Charge your battery and when parked up, disconnect the connector at the rear of the alternator. If the vehicle cranks ok the next morning you have to suspect the alternator.

If the problem persists you then obviously have a current drain somewhere else. As you have removed the fuses and it made no difference .. this suggest that the drain could be in the instrument cluster/dashboard.

The best option is to visit an auto electrician. He'll be able to identify the cause of the drain within minutes

check lights and connections either bad battery or a parasite drain the following link showes haw to look and correct a parasite drain
How to Find Parasitic Battery Drain How To Perform Parasitic Draw Test EricTheCarGuy

you may have a short circuit in the system seek auto electriction

Usually if battery is good. Its usually a parasitic drain. You can use a standard multimeter, and put across each fuse top. Two little tips. If you see a voltage even a little bit. That's a drain. Find what fuse go's too. And diagnose.

if you installed a new battery as well as a new alternator, it should not go dead overnight. if you have a short in the vehicle that will drain a new battery that rapidly, the cable would have been melted already. although, dome lights do have a tendency to drain batteries, but not overnight. use a multimeter to check the battery voltage while the motor is running. it should read above 13 volts DC signifying that the alternator is indeed charging the battery.

Has a parasitic draw (drain) on the electrical circuit ! Watch this video !
Improved Methods to Find Parasitic Draw Battery Drains Overnight


The BEST Way TO Perform Parasitic Draw Test

Something is staying on or a control module isn't powering down .

Buy new battery
ampifiers take little current to rise the voltage
also look for unwanted bugs xD

you have something draining the battery,check for any lights that might be staying on,interior light,stop light under the hood light(if any),glove box light trunk light, if you have a multimeter with amp testing capability or an amp meter you can check where the drain is by removing each fuse & put the probes on each side the terminals until you find a drainage,that way you might be able to find out what is draining the power & rectify it......hope this helps......cheers

Look for a sticking a/c relay.

First thing you need to do is make sure battery is fully charged & have it load tested. If that and the rest of your charging system checks out, then you'll have to test for a battery draw, when vehicles off.