Charging problems on 2000 7.3
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Joined: Jan 2018
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Charging problems on 2000 7.3
I have a 2000 F350 7.3 I change the alternator and it still won’t charge had the alternator tested and tested fine along with the batteries my connections on the batteries are very clean but when I turn the key on I do not have a battery light that illuminates any help would be greatly appreciated
Tuned
Joined: Dec 2017
Posts: 293
Likes: 29
From: Houston
In your case the #74 light bulb is probably burnt out. Pulling the instrument panel and changing out the #74 "warning light" bulbs is actually pretty easy. While you are at it you probably want to have some #194LL "gauge illumination" bulbs on hand. Change all the bulbs while you have the instrument panel out. I just went thru this alternator light exercise, posted a wiring diagram at https://www.ford-trucks.com/forums/1...r-reading.html . (I am assuming your diesel only has one alternator). If you have 2 alternators, the PCM gets involved in monitoring the secondary alternator..
To verify the bulb is in fact burnt out, get a multimeter and probe the voltage on the LG/RD wire that makes its connection at the alternator. If it reads anything less than 10VDC your "alternator light" should be "on"; normal alternator operation should provide ~12 VDC at this test point. (the wiring diagram I posted is for a gasser, your diesel wiring is a little different, but the LG/RD wire going to the dash light is exactly the same.)
For what it is worth, I believe our truck Volt Meters are actually controlled by a solid state module, making them more of an "idiot meter" than a Volt Meter.
To verify the bulb is in fact burnt out, get a multimeter and probe the voltage on the LG/RD wire that makes its connection at the alternator. If it reads anything less than 10VDC your "alternator light" should be "on"; normal alternator operation should provide ~12 VDC at this test point. (the wiring diagram I posted is for a gasser, your diesel wiring is a little different, but the LG/RD wire going to the dash light is exactly the same.)
For what it is worth, I believe our truck Volt Meters are actually controlled by a solid state module, making them more of an "idiot meter" than a Volt Meter.
Laughing Gas
Joined: Aug 2006
Posts: 1,002
Likes: 2
From: SW ON, Canada
Maybe a Bad regulator Wire? Here's What I Did.
Hey CC, here's a link to my problem which although not exactly the same as yours, may hold some insights. Good Luck.
https://www.ford-trucks.com/forums/1...ator-good.html
https://www.ford-trucks.com/forums/1...ator-good.html
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Stewart_H
1999 - 2003 7.3L Power Stroke Diesel
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Mar 18, 2016 08:58 PM
