factory alternator, worth holding onto? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**wancosc356** · 05-09-2009, 07:01 PM

Hey guys. I pulled my alternator to test it today and its no good. It failed twice on a tester at autozone. Just curious if I should go back and pay the core charge to get the original alternator back? Its a $10 core charge. Im not sure if it is something special to hold onto or not. U tell me? Thanks
Michael

JimKshortstep4x4 · 05-09-2009, 07:17 PM

There are lots of the original low output 37 amp alternators. Unless you want to keep the numbers that match the date code of the engine they are not worth keeping.

With the age of these trucks it is possible that it was not the original alternator anyway.

Jim

**wancosc356** · 05-09-2009, 08:12 PM

oh ok. sounds good. Im not too worried about it. Just didn't wanna catch flack for getting rid of it. Yeah. I hear ya. Thanks.
Michael

Maybe someone can help me on a side note:
Im replacing the battery cables and the negative that runs from the block to the battery has a little smaller cable coming from the terminal connector. Can anyone tell me what that is supposed to connect to??? I know the positive cable that runs from the starter to the battery has the smaller cable connected to another cable on the inside of the fender on a mount...I assume that is correct. Anyways, any help would be appreciated. Thanks

68gmsee · 05-09-2009, 09:20 PM

Quote:

Originally Posted by wancosc356

.... I know the positive cable that runs from the starter to the battery has the smaller cable connected to another cable on the inside of the fender on a mount...I assume that is correct. Anyways, any help would be appreciated. Thanks

The positive is correct and on the negative it probably is for some sort of ground. Probably a replacement cable. I didn't have it on my original 68 GMC that I remember.

**wancosc356** · 05-09-2009, 10:12 PM

Quote:

Originally Posted by 68gmsee

The positive is correct and on the negative it probably is for some sort of ground. Probably a replacement cable. I didn't have it on my original 68 GMC that I remember.

Yeah. Thanks. I just realized that since I am using replacement universal cable kits, that they are for negative or positive. So the one on the negative will not be used. Thanks.

05-09-2009, 07:01 PM	#1
wancosc356 I Like Mine With No Shine! Join Date: Apr 2009 Location: SC Posts: 2,705	factory alternator, worth holding onto? Hey guys. I pulled my alternator to test it today and its no good. It failed twice on a tester at autozone. Just curious if I should go back and pay the core charge to get the original alternator back? Its a $10 core charge. Im not sure if it is something special to hold onto or not. U tell me? Thanks Michael

05-09-2009, 07:17 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: factory alternator, worth holding onto? There are lots of the original low output 37 amp alternators. Unless you want to keep the numbers that match the date code of the engine they are not worth keeping. With the age of these trucks it is possible that it was not the original alternator anyway. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC

05-09-2009, 08:12 PM	#3
wancosc356 I Like Mine With No Shine! Join Date: Apr 2009 Location: SC Posts: 2,705	Re: factory alternator, worth holding onto? oh ok. sounds good. Im not too worried about it. Just didn't wanna catch flack for getting rid of it. Yeah. I hear ya. Thanks. Michael Maybe someone can help me on a side note: Im replacing the battery cables and the negative that runs from the block to the battery has a little smaller cable coming from the terminal connector. Can anyone tell me what that is supposed to connect to??? I know the positive cable that runs from the starter to the battery has the smaller cable connected to another cable on the inside of the fender on a mount...I assume that is correct. Anyways, any help would be appreciated. Thanks



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