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How to Replace Alternator 04-08 Ford F150 Truck

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  1. step : Disconnecting the Battery (0:37)
    • Disconnect the negative battery cable with an 8mm socket and ratchet
  2. step : Removing the Air Intake Hose (0:56)
    • Loosen the two hose clamps on the air intake hose with a flat blade screwdriver
    • Disconnect the vacuum hose
    • Remove the air intake hose
  3. step : Removing the Alternator (1:18)
    • Insert the 1/2 inch drive ratchet into the tensioner
    • Turn the tensioner clockwise to loosen the belt
    • Pull the belt off the alternator
    • Release the tensioner
    • Remove the 10mm nut from the alternator wiring harness
    • Remove the four 10mm bolts from the alternator bracket
    • Disconnect the alternator wiring harness
    • Remove the alternator bracket
    • Loosen the two 10mm bolts from the bottom of the alternator
    • Lift the alternator up and out
  4. step : Installing the New Alternator (2:57)
    • Insert the alternator into place
    • Insert the bracket on top of the alternator
    • Tighten the four 10mm bolts to the bracket
    • Tighten the four 10mm bolts to 20 foot-pounds of torque
    • Connect the alternator wiring harness
    • Tighten the 10mm nut to the alternator wiring harness
    • Tighten the two 10mm bolts to the bottom of the alternator
    • Tighten the two 10mm bolts between 20 to 25 foot-pounds of torque
    • Pull the belt off the idler pulley
    • Pull the tensioner clockwise with the 3/8 inch ratchet
    • Pull the belt over the alternator
    • Pull the belt under the idler pulley
    • Release the tensioner
  5. step : Reinstalling the Air Intake Hose (5:10)
    • Insert the air intake hose in place
    • Tighten the two hose clamps with a flat blade screwdriver
    • Reconnect the vacuum hose
  6. step : Reconnecting the Battery (5:26)
    • Reconnect the negative battery cable

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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 how to replace the alternator on this 2005 Ford F150 with the 4.6-liter V8 engine. The items you'll need for this is a new alternator from, 1/2" ratchet, a piece of pipe for extra leverage, an 8mm and 10mm socket and ratchet, and a torque wrench.

You want to start off by disconnecting your battery. Just disconnect the negative battery cable, using an 8mm socket and ratchet. Pull the cable free.

Using your screwdriver, just loosen up the hose clamp here and right here. Then push the tab on this hose and pull it free. Then pull your air intake hose free.

Now, using your 1/2" ratchet, just push it into the tensioner. Using a piece of pipe for some extra leverage, just pull the ratchet or breaker bar back and then pull the belt off the alternator. Then carefully release the tension on the ratchet and pull it free. Lift up this harness from that stud and then remove this 10mm nut holding on this harness. Once you remove that nut the harness will pull free.

Now you want to remove these four 10mm bolts. We'll fast-forward as Mike does that. Now push the tab on this harness and disconnect it, and pull that bracket free. Now down here there's two more 10mm bolts holding in the alternator. You just need to loosen them up. We'll fast-forward as Mike loosens those up. Once they're loosened up you can just lift your alternator up and out.

Take your new alternator and feed it down into place. Since our original alternator was working fine we're just reinstalling it. Then you can reconnect the harness and replace that bracket. Then replace those four 10mm bolts and tighten them up. Torque each of those 10mm bolts to 20 foot-pounds. Replace that 10mm nut that holds this harness in place and tighten it up. On this nut you'll see I have a torque wrench in my hand. You don't have to torque this nut. You just want to tighten it up firm but not too tight. Then push that cover back down.

Now tighten up those two lower 10mm bolts. You'll want to torque these to 20 to 25 foot-pounds as well. Take my pipe, pull as far as I can on the tensioner and I should be able to lift the belt up. I'm going to try and take it off of this idler pulley, get it up onto the alternator, pull my tensioner and then push the belt down. You can see the idler pulley is the last one. Push it right down under.

Replace your air intake hose, reconnect this hose, and then tighten up those two hose clamps.

Push your negative battery cable back into place and just tighten it back up.

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

  • Torque Wrench
  • 1/2 Inch Ratchet
  • A Piece of Pipe (for leverage)
  • Ratchet

  • Sockets - Metric

  • 8mm Socket
  • 10mm Socket

2004 - 2004  Ford  F150 Truck
2005 - 2008  Ford  F150 Truck
2006 - 2008  Lincoln  Mark LT

04 F150 (New Body); 05-08 F150 (exc 4.2L); 06-08 Mark LT (110 Amp) Alternator

Ford F150 Lincoln Mark LT Alternator DIY Solutions ECS00053

This part replaces:

  • Hollander 601-00993
  • Lester 8318
  • TYC 2-08318
  • OE # 4L3Z10346BA
  • OE # 4L3U10300BA

Part Details

  • Voltage / Wattage / Amperage Rating: 110 Amp
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