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F150 alternator i have a 2005 ford f 150, and having alternator problems, how do i find the regulator and how would i know if i need to replace the whole alternator...btw the km are at approx. 200k +

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  • kirby johnnie Oct 17, 2013

    my battery is completely dead, tried boosting it but it might take 20 mins to charge the battery in order for it to start the truck...from the last time i did that the truck started loosing power with instruments going first then headlights then the truck died...i take it its the alternator?



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  • Cars & Trucks Master
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Check the battery with a meter on volts. on a good charge it should be around 12.05v. run engine and test battery again should say around 13-14 volts. if you get 7-8-9 volts then the alternator is not working.. and the alternator is fitted to the fan belt has 2 bolts holding it in place, take the belt off. and remove its bolts and unplug the wire plug and un bolt the thick wire off the copper nut. replace with new or one known to be working.

Posted on Oct 15, 2013


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See Figures 1 and 2

0900c1528004b8db.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 1: Rear terminal alternator

0900c1528004b8dc.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Fig. 2: Side terminal alternator

  1. Open the hood and disconnect the battery ground cable.
  2. Remove the adjusting arm bolt.
  3. Remove the alternator through-bolt. Remove the drive belt from the alternator pulley and lower the alternator.

Some engines are equipped with a ribbed, K-section belt and automatic tensioner. A special tool must be made to remove the tension from the tensioner arm. Loosen the idler pulley pivot and adjuster bolts before using the tool. See the accompanying illustration for tool details.
  1. Label all of the leads to the alternator so that you can install them correctly and disconnect the leads from the alternator.
  2. Remove the alternator from the vehicle.
  3. To install, reverse the above procedure. Torque the pivot bolt to 58 ft. lbs.; the adjusting bolt to 25 ft. lbs.; the wire terminal nuts to 60-90 inch lbs.


The fan belt drives the alternator and water pump. If the belt is too loose, it will slip and the alternator will not be able to produce it rated current. Also, the water pump will not operate efficiently and the engine could overheat.
Check the tension of the belt by pushing your thumb down on the longest span of the belt, midway between the pulleys. Belt deflection should be approximately 1 / 2 inch; (13mm).To adjust the belt tension, proceed as follows:
  1. Loosen the alternator mounting bolt and the adjusting arm bolts.
  2. Apply pressure on the alternator front housing only, moving the alternator away from the engine to tighten the belt. Do not apply pressure to the rear of the cast aluminum housing of an alternator; damage to the housing could result.
  3. Tighten the alternator mounting bolt and the adjusting arm bolts when the correct tension is reached.

Posted on Apr 07, 2009

  • 1776 Answers

SOURCE: How to replace an alternator. Ford econoline 150

I suggest checking out the website and register the vehicle. It doesn't cost anything and will give you access to an online repair manual. The steps for replacing the alternator should be available there. Hope this helped and best wishes.

Posted on Sep 05, 2009

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SOURCE: 05 Ford F150 Radio doesn't work.

it needs to be programed to your vehicle. we have to program every replacement radio we install at the dealership. only takes a few mins.

Posted on Apr 27, 2010

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