alternator help again please - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Adam12 · 10-19-2003, 10:34 PM

I just bought a new alternator and its already bad I think. here are some pics of how it is wired right now. the small red wire goes to the fuse block and the big red wire is going to the +battery post. I think its wired wrong because the harness is cut off at the block and I think that it is the old alternator harness, I will post a pic and maybe someone can tell me.

Adam12 · 10-19-2003, 10:34 PM

wiring harness

Adam12 · 10-19-2003, 10:35 PM

is this somthign I need? where can I get it?

red71cheyenne · 10-19-2003, 11:34 PM

I don't have the engine wiring diagram here, or I would tell you. The harness plug you have there is for the alternator using the internal regulator. The little jumper wire is for bypassing the external regulator. Judging by the harness in your truck it looks to have been chopped pretty good. I would get a wiring diagram, I think there is one on the board here somewhere, or someone can post the engine side of it to show where the wires from the alternator go. Good luck, Jeff.

jorgensensc · 10-19-2003, 11:41 PM

Check out this website for wiring diagrams:

Autozone website

Hope it helps!!!!

red71cheyenne · 10-19-2003, 11:41 PM

Just found my pic

*racedvl* · 10-20-2003, 12:11 AM

Here's how I did it. This is the alt. side, just replace left side with left side, and right side with right. The pig tail should be availbe at any parts store.

*racedvl* · 10-20-2003, 12:12 AM

And here is the regulator side. I have had it set-up this way for about 3 years now. Works great!

*racedvl* · 10-20-2003, 12:12 AM

Sorry here's the pic. . . .

Adam12 · 10-20-2003, 08:46 PM

I still lost the wiring diagram kinda confuses me because when I got the truck the wiring was already hacked and it shows stuff going to the external regulator and a junction block? sorry im not the greatest at this wiring stuff, can anyone kinda walk me through it?

Hooter · 10-20-2003, 11:15 PM

huh, its a lot simpler then I thought

REDNEKID · 10-22-2003, 09:57 AM

So maybe thats why my stupid voltage light is always on!
I need to check into this. Thanks guys!

tom hand · 10-22-2003, 11:07 AM

Dump all the original wiring and rewire it from this page:

http://www.oldengine.org/unfaq/10si.htm

A.P. · 10-23-2003, 03:35 AM

Here is the wiring diagrams.

http://www.geocities.com/chevroletc1070/wiringdias.html

A.P. · 10-23-2003, 03:44 AM

Click on the link and thats how I have my alternator connected.

http://www.autorewire.com/tech/charg...10SInandd.html

Adam12 · 10-23-2003, 12:39 PM

Thanks everybody those Diagrams are exactly what I needed. THANKS!

Jerdog · 10-26-2003, 05:13 PM

Hey Adam12, hopefully you have already solved you alternator problem. But if not or if you need other alternator / starter motor help, I've had real good help from Quality Heavy Duty Diesel Electric here in town (Bakersfield). jerdog

10-19-2003, 10:34 PM	#1
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	alternator help again please I just bought a new alternator and its already bad I think. here are some pics of how it is wired right now. the small red wire goes to the fuse block and the big red wire is going to the +battery post. I think its wired wrong because the harness is cut off at the block and I think that it is the old alternator harness, I will post a pic and maybe someone can tell me. Attached Images __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-19-2003, 10:34 PM	#2
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	wiring wiring harness Attached Images __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-19-2003, 10:35 PM	#3
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	I saw this in another thread about alternator wiring is this somthign I need? where can I get it? Attached Images __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-19-2003, 11:34 PM	#4
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	I don't have the engine wiring diagram here, or I would tell you. The harness plug you have there is for the alternator using the internal regulator. The little jumper wire is for bypassing the external regulator. Judging by the harness in your truck it looks to have been chopped pretty good. I would get a wiring diagram, I think there is one on the board here somewhere, or someone can post the engine side of it to show where the wires from the alternator go. Good luck, Jeff. __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty

10-19-2003, 11:41 PM	#5
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Check out this website for wiring diagrams: Autozone website Hope it helps!!!! __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

10-19-2003, 11:41 PM	#6
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	Just found my pic __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty Last edited by red71cheyenne; 10-04-2007 at 08:36 PM.

10-20-2003, 12:11 AM	#7
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	Here's how I did it. This is the alt. side, just replace left side with left side, and right side with right. The pig tail should be availbe at any parts store. Attached Images

10-20-2003, 12:12 AM	#8
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	And here is the regulator side. I have had it set-up this way for about 3 years now. Works great!

10-20-2003, 12:12 AM	#9
racedvl Account Suspended Join Date: Jan 2000 Location: Woodstock, IL Posts: 7,020	Sorry here's the pic. . . . Attached Images

10-20-2003, 08:46 PM	#10
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	I still lost the wiring diagram kinda confuses me because when I got the truck the wiring was already hacked and it shows stuff going to the external regulator and a junction block? sorry im not the greatest at this wiring stuff, can anyone kinda walk me through it? __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-20-2003, 11:15 PM	#11
Hooter My other Love Join Date: Aug 2001 Location: Castlegar B.C. Canada Posts: 4,085	huh, its a lot simpler then I thought __________________ Castlegar B.C.The great white North (Canada Eh!) Hooter_5@hotmail.com First generation Monte Carlo club pictures of my life

10-22-2003, 09:57 AM	#12
REDNEKID Who said that? Join Date: Aug 2003 Location: HOUSTON, TX. Posts: 106	So maybe thats why my stupid voltage light is always on! I need to check into this. Thanks guys!

10-22-2003, 11:07 AM	#13
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	Dump all the original wiring and rewire it from this page: http://www.oldengine.org/unfaq/10si.htm __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

10-23-2003, 03:35 AM	#14
A.P. Black 72 Chevy Join Date: May 2002 Location: Los Angeles, California Posts: 662	Here is the wiring diagrams. http://www.geocities.com/chevroletc1070/wiringdias.html

10-23-2003, 03:44 AM	#15
A.P. Black 72 Chevy Join Date: May 2002 Location: Los Angeles, California Posts: 662	Click on the link and thats how I have my alternator connected. http://www.autorewire.com/tech/charg...10SInandd.html



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10-23-2003, 12:39 PM	#16
Adam12 I hate trannys Join Date: Dec 2001 Location: Bakersfield,CA Posts: 160	Thanks everybody those Diagrams are exactly what I needed. THANKS! __________________ 70 SWB 481 ci, TH-400, Edlebrok Victor Jr. intake, Holley street avenger 770, Dynomax ceramic coated headers. Dual flowmasters. and only 3516134 more little things to do.

10-26-2003, 05:13 PM	#17
Jerdog Registered User Join Date: Feb 2003 Location: Bakersfield, CA Posts: 38	Hey Adam12, hopefully you have already solved you alternator problem. But if not or if you need other alternator / starter motor help, I've had real good help from Quality Heavy Duty Diesel Electric here in town (Bakersfield). jerdog

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