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Tracy Martin TN 
Orange Level Access
Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10769
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 Topic: D15 charging system?
Posted: 26 Mar 2012 at 7:22pm |
My D15 wouldn't start. Nothing at all, tried to jump thru solenoid, barely a buzz, battery flat. I charged the battery,started fine. When cranking it will show a discharge. When running will not show charging. Is it the generator or voltage regulator? How do I check it to find out? Thanks Tracy Martin
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Brian Jasper co. Ia
Orange Level
Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508
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Posted: 26 Mar 2012 at 8:01pm |
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You can test the gen easily. Remove the belt, disconnect the wires, and run battery voltage to the A terminal. It should spin like a motor. While motoring, ground the F terminal to the case. It should slow down, but continue to motor. Load test all of your wires by using them in a circuit to power a headlight bulb. If the wires and gen pass, the regulator is all that's left.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10769
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Posted: 26 Mar 2012 at 8:39pm |
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Brian, I will try that method. Thanks for the help. Tracy Martin
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No greater gift than healthy grandkids!
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Coke-in-MN
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41979
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Posted: 26 Mar 2012 at 8:56pm |
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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D-17_Dave
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Joined: 11 Sep 2009
Location: Mocksville NC
Points: 990
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Posted: 26 Mar 2012 at 9:21pm |
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Never done it like Brian described, I always run the engine at half or so throttle and ground the F or Field terminal. You should see the amp meter jump to full charge. This too shows the generator is good or not. 90% of the time I find either a stuck brush or corroded brush holder or a bad regulator. Most of the new regulators are china made and the metal rivets on the bottom rust soon after installing it and it fails. IF you determine a faulty regulator I'd pop the cover and buff the points and check them for sticking and so forth before replacing. You might get lucky and keep a better one than you can buy.
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Yea, I can fix that.....
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Coke-in-MN
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Joined: 12 Sep 2009
Location: Afton MN
Points: 41979
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Posted: 27 Mar 2012 at 5:29pm |
Here is everything you need to know on generators - delco service bulletin
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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