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How to Replace Alternator 02-08 Dodge Ram

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  1. step : Disconnecting the Battery (0:30)
    • Disconnect the negative battery cable with a 10mm wrench
  2. step : Removing the Serpentine Belt (0:42)
    • Familiarize yourself with the route of the serpentine belt
    • Insert the 3/8 inch drive ratchet into the tensioner
    • Turn the tensioner clockwise to loosen the belt
    • Pull the belt off the alternator
  3. step : Removing the Alternator (1:12)
    • Disconnect the alternator wiring harness
    • Remove the alternator power terminal connector
    • Remove the 13mm nut from the power terminal
    • Pull the power cable off the alternator
    • Remove the two 15 millimeter bolts at the bottom of the alternator
    • Pry the alternator out using a flat blade screwdriver
  4. step : Installing the Alternator (1:57)
    • Put the alternator into place
    • Install the two 15mm bolts into the bottom of the alternator
    • Put the power cable onto the power terminal
    • Tighten the 13mm nut onto the power terminal
    • Put on the power terminal cover
    • Connect the alternator wiring harness
  5. step : Installing the Serpentine Belt (2:35)
    • Route the serpentine belt around the pulleys, following the belt diagram
    • Pull the tensioner clockwise with the 3/8 inch ratchet
    • Pull the belt over the alternator
    • Release the tensioner
  6. step : Connecting the Battery (3:14)
    • Connect the negative battery cable with a 10mm wrench

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Hi, I'm Mike from 1A Auto. I hope this how-to video helps you out, and next time you need parts for your vehicle, think of Thanks.

In this video, we're going to show you alternator replacement. This is a 2008 Dodge Ram with a 5.7 liter, and it's pretty much the same for this vintage 5.7 liter Hemi V8. You'll need 10 to 15 millimeter sockets or wrenches, a 3/8 drive ratchet, and a flat blade screwdriver.

Before working on any part of the electrical system, you'll want to use a 10 millimeter wrench to remove the negative terminal of your battery, and set if off to the side.

Here's your serpentine belt. Before removing, you'll want to make sure you have the diagram for it. Usually located under the hood, or on the radiator support of you vehicle. Our truck doesn't have one, so we're going to make our own.

Using the drive from a 3/8"? ratchet, you'll insert it into the slot on the tensioner. Remove the tension from the belt. Take it off the pulley.

Remove the safety on the connector on the back of the alternator. Remove the connector. Remove the cover to the power terminal using a 13 millimeter deep socket. Remove the nut and power cable. Remove the two 15 millimeter bolts at the bottom of the alternator. Using a flat head screwdriver, or a small pry bar, work the alternator off of its posts.

To reinstall the alternator line up your bolt holes, and reinstall the two 15 millimeter bolts. Reinstall your power cable, and the 13 millimeter nut. Go ahead and pop the cover back on. Reinstall the two pin connector to the back of the alternator. Slide the safety back on.

Ensure that the rest of your serpentine belt is routed properly. Release the tension from your belt tensioner. Install your belt back on to your alternator pulley. Release the tensioner. If your serpentine belt fell off during the repair, or if you decide to replace your serpentine belt at the same time, here's a quick run through of how to route the belt onto the pulleys properly.

Reinstall your negative battery terminal. Tighten it back with a 10 millimeter socket.

Thanks for tuning in. We hope this video helps you out. Brought to you by, your source for quality replacement parts and the best service on the Internet. Please feel free to call us toll-free, 888-844-3393. We're the company that's here for you on the Internet and in person.

Tools needed for replacement:

    Ratchets & Related

  • 3/8 Inch Drive Ratchet

  • Screwdrivers & Related

  • Flat Blade Screwdriver

  • Sockets - Metric

  • 10mm Socket
  • 15mm Socket
  • 13mm Socket

  • Wrenches - Metric

  • 10mm Wrench

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