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Help me diagnose dead alt?

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Old 12-29-2011, 04:48 PM
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Originally Posted by dukie564
I've been contemplating building a splash shield for a while now, just haven't got around to it. Home Depot sells sheets of galvanized ducting sheet metal for cheap - should be the perfect size

Like so:

Remember, if you submerge that splash plate, anything that goes above it will stay up there. You'd be better off fabbing a somewhat encased metal shell for the alt itself. But with that also, if it wasn't fully encased, it would let things in. And they'd stay there up against it.
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Old 12-29-2011, 04:52 PM
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Rinse it out good and if that don't do it look for an Alt. repair shop. Probably rebuild it for $30
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Old 12-29-2011, 04:53 PM
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Originally Posted by CherokeeCountry
Remember, if you submerge that splash plate, anything that goes above it will stay up there. You'd be better off fabbing a somewhat encased metal shell for the alt itself. But with that also, if it wasn't fully encased, it would let things in. And they'd stay there up against it.
Yea I'm going to do a splash plate for temporary protection while I get a hold of someone to help me weld together some sort of protection for the alt itself. I wish the alts were higher like other vehicles..
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Old 12-29-2011, 05:04 PM
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I killed my alternator with mud after going through a 3+ foot deep puddle, had to replaced it. The thing seized right up after sitting a day and screeched the hell out of the belt. Sprayed it with a hose and worked it a bit to free it up but it was no longer creating current.
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Old 12-29-2011, 05:12 PM
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Some great reading for everybody.
http://www.pirate4x4.com/tech/billavista/Wiring/Part2/
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Old 12-29-2011, 05:21 PM
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Originally Posted by seaguy
Rinse it out good and if that don't do it look for an Alt. repair shop. Probably rebuild it for $30
Really? Never even considered getting it rebuilt. Hmm. Can they increase the output a little too? What is the stock 1990 alt output anyone know? Mines the normal 4.0L not HO.
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Old 12-29-2011, 05:24 PM
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Originally Posted by radio flyer
I can't get that link to load for me. Working for anyone else?
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Old 12-29-2011, 05:25 PM
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Originally Posted by radio flyer
BTW I like your sig
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Old 12-29-2011, 08:19 PM
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I go through mud all the time and it has never affected my alt. A simple test for checking a bad alt is check the voltage at the battery with the jeep running. If it goes down its not charging if it sits around 14-14.5 its good.
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Old 12-29-2011, 08:28 PM
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Originally Posted by shooting sticks
Really? Never even considered getting it rebuilt. Hmm. Can they increase the output a little too? What is the stock 1990 alt output anyone know? Mines the normal 4.0L not HO.
60 amp without ac, 100 with.
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Old 12-29-2011, 08:59 PM
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Originally Posted by jon_89
I go through mud all the time and it has never affected my alt. A simple test for checking a bad alt is check the voltage at the battery with the jeep running. If it goes down its not charging if it sits around 14-14.5 its good.
Yeaaa my voltage has been around like low 11's the past few weeks before my alt "died"..
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Old 12-29-2011, 08:59 PM
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Originally Posted by OleBlue
60 amp without ac, 100 with.
Hmm so I've got the 100!
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Old 12-29-2011, 09:10 PM
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Originally Posted by shooting sticks
BTW I like your sig
??? Works every time i click on it!
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Old 12-30-2011, 12:37 AM
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Originally Posted by radio flyer
??? Works every time i click on it!
I'm talking about the fishing reference!
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Old 12-30-2011, 05:34 AM
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Originally Posted by shooting sticks
I'm talking about the fishing reference!
Thanks for the clarification. I was standing on the shore like an idiot trying to figure that out!!
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