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#1 |
Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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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 |
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#2 |
It's a catastrophic success.
![]() Join Date: Jan 2003
Location: Oklahoma
Posts: 2,077
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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(- -) |
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#3 |
Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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thanks very much, must be internal, because i has to use a the (- -) to hook it up
Ryan |
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#4 |
resident geek
Join Date: Jan 2005
Location: Dusty West Texas
Posts: 77
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Externally regualted should have a regulator mounted someplace too.. little black box looking thing.
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71 C-10 stepper 88 Moostang T-Top w/ lots of goodies |
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#5 |
Registered User
Join Date: Mar 2005
Location: Camrose, Alberta
Posts: 26
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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 |
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#6 |
Msgt USAF Ret
![]() ![]() Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,714
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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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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#7 |
resident geek
Join Date: Jan 2005
Location: Dusty West Texas
Posts: 77
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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 |
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#8 |
got boost?
Join Date: Mar 2005
Posts: 123
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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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'70 chevy lwb w/'67 hood. 357 s.b.c. built, 4l60 w/vigilante lockup high stall converter, edelbrock pro-flo,brodix heads,comp cams rollerized w/ belt drive, one piece d-shaft, yada, yada, yada..... '82 honda v45 sabre"the black" ![]() |
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#9 |
The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,477
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External Box
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Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T |
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#10 |
Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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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 |
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#11 |
It's a catastrophic success.
![]() Join Date: Jan 2003
Location: Oklahoma
Posts: 2,077
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eliminate the external reg.
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#12 |
Registered User
Join Date: Jan 2001
Location: Kirkland, WA, U.S.A.
Posts: 32
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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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'68 Chevy Stepside in Frame-up Restoration process. 292 CID Clifford Performance Modified T56 6-speed Tranny Slammed, Custom IFS and IRS Money?...Too Much! |
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#13 |
Registered User
Join Date: Apr 2003
Location: NB
Posts: 3,367
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^ good point! Also make sure the grounds are good on the voltage reg!
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