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2007+ Expedition & Navigator 2007, 2008, 2009 and 2010 Ford Expedition and Lincoln Navigator

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Old 01-19-2010, 06:11 PM
ElmoIsBold ElmoIsBold is offline
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2000 Expedition w/4.6 - how to test voltage regulator?

Thread title should say it all, but the specific questions I have are:

1) where are the test points? Need I remind anyone how general the Chilton's manuals are? Mine is not doing me much good.

2) at what RPM should I expect the alternator voltage to exceed battery voltage in an obvious way?

In other words, I love my truck, I'm handy with tools, I own a bunch of them, and I have a Bachelors degree in Electrical Engineering (though I refuse to let that hinder me).

I'm getting battery voltage from the alt at idle.

Please help!

Elmo
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Old 01-20-2010, 11:03 AM
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berry1234 berry1234 is offline
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This is 2007 and up forum. Try the other one for older expys.
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2008 Expedition Eddie Bauer 4x2


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Old 01-20-2010, 11:12 AM
ElmoIsBold ElmoIsBold is offline
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Update:

I put too much trust in my battery and hit the road this morning only to have it die on me.

The Expedition is now at the shop.

Based on what I saw and heard yesterday when I was making my feeble attempts to check the alternator with my voltmeter, and based on its gutsy, powerful start this morning, I thought the battery (with no headlights on) would get me 10 miles to the school and back, and then I could connect it to the charger.

I never got a chance to figure out whether the voltage regulator alone could be blamed! It's got 95,000 miles on it, so maybe I should have just gone for the whole alternator...

Too late now. Sure the shop will get money for labor, but that's okay. They're good guys. It's just that my Expy is my hobby truck. I'm supposed to keep it running while the shop fixes all my newer vehicles. So really the biggest bummer about all of this is my lost opportunity to gain knowledge and experience.

I'll get over it.

Elmo
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Old 01-20-2010, 11:55 AM
ElmoIsBold ElmoIsBold is offline
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Quote:
Originally Posted by berry1234 View Post
This is 2007 and up forum. Try the other one for older expys.
Right - sorry! I thought I was clicking on:

Expedition & Navigator
1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator
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Old 01-20-2010, 11:55 AM
 
 
 
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1999, 2000, 2004, 2005, 46, expedition, expeidtion, f250, ford, location, put, regualtor, regulater, regulator, test, voltage

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