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01-24-2005, 01:05 AM
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#1 |
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Registered User
Join Date: Oct 2004
Location: Nor Cal
Posts: 75
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Alt question
I got a used Alternator from a friend, It looks like the one that installed on my 350.( External reg.) All I know is that he got it off of a '75 chev. truck w/350. How can I tell if it has an internal reg? And when did they stop the extrenal reg on trucks?
Thanks in advance 
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--------------------------------- 72 C10 SWB 350 Work in progress 98 HD Fatboy 09 HD Heritage Softail 05 Honda Element |
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01-24-2005, 01:11 AM
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#2 |
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Registered User
Join Date: Oct 2004
Posts: 393
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Internal regs have a thin two wire plug that goes in the side-look for a small slot with two blades visible.
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01-24-2005, 01:14 AM
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#3 |
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My other Love
Join Date: Aug 2001
Location: Castlegar B.C. Canada
Posts: 4,085
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well it will definetly be an internally regulated alternator if it is on a 75 chev truck, they started putting internally regulated alts on chevys in late 72 and all chevys had that alt in 73. The way you can tell is, the internally regulated alts have a flat rectangular plug on the top and the externally regulated use a square plug
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 Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life |
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01-24-2005, 03:05 AM
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#4 |
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Still drivin' a Rat Rod
Join Date: Sep 2004
Location: Monett Missouri
Posts: 4,925
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An internal regulated alt will look like this,external regulated ones plug into the back.
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Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the *a$#* 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website |
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01-24-2005, 03:13 AM
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#5 |
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Got Light Emitting Diode?
Join Date: Apr 2004
Location: Newberg, OR
Posts: 2,485
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internal one looks like the one posted above (even though it doesnt have the right plug) and a external is a square shaped plug with the conectors stacked instead of side by side
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1968 1/2 ton 2wd lwb 6 lug disc and bags up front. Next c notch and rear bags '02 Chevy Silverado LT ext cab short bed 2WD 5/7 drop on 22's  (the family car)1993 Cherokee work ride/weekend wheeler |
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01-24-2005, 08:54 AM
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#6 |
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Registered User
Join Date: Oct 2004
Location: Nor Cal
Posts: 75
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Thanks guys, anyway to tell the amperage?
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--------------------------------- 72 C10 SWB 350 Work in progress 98 HD Fatboy 09 HD Heritage Softail 05 Honda Element |
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01-24-2005, 09:55 AM
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#7 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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The case should be stamped, E.G. "63 A".
Jim |
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