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Old 11-16-2014, 03:27 PM   #1
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Alternator fuses on 2000 Dynasty

Trying to trouble shoot our "alt fail" dash
Light. Someone suggested that there may be a blown fuse but we can't figure out where they are. someone on an earlier thread I posted showed pictures of a different chassis and they appeared to be in the engine compartment.
Fortunately we are off the road in a Walmart and have found a place nearby that does alternator repair on big rigs for morning repair. But it would sure be great if it was just a fuse
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Old 11-17-2014, 05:15 AM   #2
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Ours were in a "cigarette pack" sized plastic box inline with a couple of wires coming off the alternator - IN the engine compartment... 2 each 5 amps as I recall..
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Old 11-17-2014, 06:31 AM   #3
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I am not at my dynasty to look but if I remember right their is a fuse at the battery on the small wire going to the alternator. When I had the alt fail I called the leece-neville alternator tech rep. He said start at the alternator looking for loose conections and move to the battery. I found that the wire that excited the alternator was broken. Makes me wonder how many are rebuilt when it was a bad connection. Do some research on this site before you go to the shop as the problem can be a lot of simple things. Good luck.
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Old 11-17-2014, 10:03 AM   #4
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Well we are at Johnny's Auto & Electric in Garner, NC. They were super to get us in. While there is a broken wire the alternator is dead. Rebuilding it for us. While the total is $700+ its certainly less than new. Its a 200 amp and after checking the least a new one is $1000+/- a little plus labor. Don't even ask what the Cummins people here wanted. Guess since its over 14 years old with 106K miles on it we won't complain
Thanks for all your help.
At least it happened without us being dead on the side of the highway
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Old 11-17-2014, 10:10 AM   #5
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I had a failure of my alternator a couple years ago. It was caused by the large copper cable connector coming loose form the alternator. As it was making partial contact, high levels of resistance melted the connector and mounting stud. A shop rebuilt the alt and the mechanic replaced the connector and all was fine.
I don't know if this helps, but it may be what you are experiencing.
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Old 11-17-2014, 10:19 AM   #6
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I can say that our technician here is super. He checked everything known to man for the simplest fix.... Fuses,wires, etc Before declaring the alt dead.
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Old 11-17-2014, 11:04 AM   #7
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I had my alternator blow about 2 years ago. Easy diagnoses, it locked and blew the serpentine belt. Replaced it with a new one in the neighborhood of $1,600 for part, shipping, installation.

Then had the alt fail light come on last year. It was a plug in relay that went bad. About $30. The VOM showed a good output from the regulator so I knew it was just a minor problem.
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Old 11-17-2014, 03:13 PM   #8
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I bought a new LN 200 amp alternator off ebay for $200. I keep it in my storage compartment just in case.
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Old 11-17-2014, 06:50 PM   #9
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Appears the only salvageable part of our alt is one end of the outside case. But rebuild they are. Apparently its been dying for awhile now. Just never heard it making noise. Parts in AM out by early aft. Of course now our refer is refusing to ignite on propane. Ignitor is fine. Enough is enough!!!
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Old 11-17-2014, 08:29 PM   #10
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On a trip 2 years ago we had gone 1000 miles or so and refer stopped working on propane, some rust from the flue had fallen on the burner and it would not ignite. I took cover off burner and used a vacuume to suck it up, worked fine after that.
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Old 11-18-2014, 02:38 PM   #11
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Quote:
Originally Posted by CJScepter View Post
On a trip 2 years ago we had gone 1000 miles or so and refer stopped working on propane, some rust from the flue had fallen on the burner and it would not ignite. I took cover off burner and used a vacuume to suck it up, worked fine after that.
John G.
Yep that worked!!!! Let's hope it stasys working
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Old 11-18-2014, 02:46 PM   #12
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We are fixed!!!! Some pretty loud noise when it started up but quickly realized that every thing was really cold (36 with wind chill at 30). Air oil all needed to warm up. We have never had her in this cold weather!!! Yipee back on the road tomorrow!!!!!
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