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03-31-2005, 02:24 PM | #1 |
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Alternator ???
I was wondering if there is a way to find out it the alternator on my truck is extenally or internally regulated. it is starting to howl intermitenly and i have an alternator i took of a 77 chevy that i can toss on it, but im not sure if what i have os internally regulated. thanks for the help
Ryan |
03-31-2005, 02:30 PM | #2 |
It's a catastrophic success.
Join Date: Jan 2003
Location: Oklahoma
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If it has a square plug its external, blade run (II)
If it has a rectangle plug its internal,blades run(- -) |
03-31-2005, 02:32 PM | #3 |
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Location: sw colorado
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thanks very much, must be internal, because i has to use a the (- -) to hook it up
Ryan |
03-31-2005, 03:13 PM | #4 |
resident geek
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Externally regualted should have a regulator mounted someplace too.. little black box looking thing.
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04-03-2005, 11:12 AM | #5 |
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Sounds like you have a external regulator may be mounted on the rad. support assy. on the drivers side under the head lights a black box about 3 inches square with a flat plug. Sounds like a bad diode in the alternater, pull alt. and reg. off and have both checked repairs to alt. cheap, and if it's been on a while it's time for brushes and bearings anyway.
Bstang |
04-03-2005, 12:18 PM | #6 |
Msgt USAF Ret
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Location: Kalamazoo, Michigan
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alternators
here's some good info on the alternators
http://www.madelectrical.com/electrical-tech.shtml VetteVet
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04-03-2005, 05:06 PM | #7 |
resident geek
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Location: Dusty West Texas
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If you do have an externally reg unit, might as well go ahead and convert to an internal reg unit. I picked up a 10si for under $40. Not a bad price for an alternator.
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71 C-10 stepper 88 Moostang T-Top w/ lots of goodies |
04-03-2005, 08:10 PM | #8 |
got boost?
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or; you can use the one you have from the '77.
just use the instructions from mad.
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04-03-2005, 08:15 PM | #9 |
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External Box
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04-04-2005, 02:51 AM | #10 |
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well the voltage regulator is there, but im not sure if it is being used. the current engine came out of a 76 and has the alternator on the wrong side for our era trucks. i also know i had to convert the wiring harness to the horizontal plug style from the vertical to make it work, and the alternator is the same as the one from the 77. so any advice on how to tell if its being internally or externally regulated? thanks
Ryan |
04-04-2005, 12:06 PM | #11 |
It's a catastrophic success.
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Location: Oklahoma
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eliminate the external reg.
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04-04-2005, 03:57 PM | #12 |
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So...you say that it is starting to howl. Sounds like the rear bearing?! If you converted, or it was converted...does it have the rear bearing support bracket attached? If not, this is accelerating your rear bearing failure! Many times people neglect this bracket when converting their vehicles (the bolt hole location changes from a DN to SI alternator).
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04-04-2005, 04:19 PM | #13 |
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^ good point! Also make sure the grounds are good on the voltage reg!
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