charging system questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

*project 67 sub* · 02-28-2008, 02:43 AM

i know this is the wrong forum but the electrical forum doesnt get very many people looking at it, and i dont think i seen the answer to the ? that i have. i have a 67 burb that the po changed over to an internal reg. alternator and an h.e.i. distributor. the first ? that i have is the problem that i am having is, is that it shows that the alternator is not charging. up untill about a week and a half ago it would charge fine, now it is not charging at all. the battery seems to be good, the alternator is good and showed that it was charging at autozone when i personally took the alternator in and tested it, but i still changed it to a better one. the other ? that i have is that when i upgraded the alt. i got a 105amp alt. and it has 3 wires that come out were their was originally 2 wires coming out and i dont know exactly what wires go where. their is a red wire(about 10gauge), and a brown and a black wire(about 14gauge) plus the batt. wire on the back of the alt. thanks in adv. this place

unlike the other forum that i frequently go on, (for my jetta) --->www.vwvortex.com.<---- they suck and are all sh!+ talkers that are better than every body else. and are haters

but anyways like i said thanks.

jay6891 · 02-28-2008, 02:54 AM

Let me go out and look @ mine and I'll try to help

jay6891 · 02-28-2008, 03:02 AM

Ok went and looked. My red 10 gauge wire is hooked to the positive on the alternator. The smaller red wire 14 gauge is also hooked to the positive on the alternator and is in position one on the plug. The black wire that I have is alos a 14 gauge in the position two on the plug and is wired to the factory dark blue wire going to alt. Then I have a factory ground wire that is wired to the case of the alt. I have also convetered to a internal reg and hei. Hope this helps. The brown wire? Is it in the facory harness? I beleive that one went to the external reg and is no longer used. I used to have a wiring diagram but it was on my other compter and it crashed and this new one has windows vista on it and my old digi camera won't work with it or I would take a pic.

*project 67 sub* · 02-28-2008, 03:25 AM

Quote:

Originally Posted by jay6891

Ok went and looked. My red 10 gauge wire is hooked to the positive on the alternator. The smaller red wire 14 gauge is also hooked to the positive on the alternator and is in position one on the plug. The black wire that I have is alos a 14 gauge in the position two on the plug and is wired to the factory dark blue wire going to alt. Then I have a factory ground wire that is wired to the case of the alt. I have also convetered to a internal reg and hei. Hope this helps. The brown wire? Is it in the facory harness? I beleive that one went to the external reg and is no longer used. I used to have a wiring diagram but it was on my other compter and it crashed and this new one has windows vista on it and my old digi camera won't work with it or I would take a pic.

the brown, red and black wire comes out of the plug for the alt. and dont know were the brown and black wire are supposed to go i have the red wire that comes out of the plug hooked up to the field wire from the old alt. and the red wire for the batt. on the back of the alt. is hooked up how it was on the old alt.

**john** · 02-28-2008, 03:05 AM

Is it charging ,but not showing on the ammeter? If so check the 4 amp fuses located in eng compartment. One will be by the junction block on RH fender the other by left front of radiator support.

*project 67 sub* · 02-28-2008, 03:16 AM

Quote:

Originally Posted by john

Is it charging ,but not showing on the ammeter? If so check the 4 amp fuses located in eng compartment. One will be by the junction block on RH fender the other by left front of radiator support.

no it is not charging and it shows that it is not charging on the gage. it does not have an ammeter it has a volt gage now. thhere is nothing on my fenders. the junction block on the left side(drivers side) core supp. has power going through it.

*project 67 sub* · 02-28-2008, 04:10 AM

anyone who can help i appreciate it. im kind of slow when it comes to wiring

jay6891 · 02-28-2008, 04:33 AM

What are the specs on the new alt? ie whats it fit? Mine is for a 80's model camaro, 105 amps. Where the plug- plugs into the alt are there numbers? That is where I got the number one and two from. The link that truckdude239 gave is how mine is wired.

**truckdude239** · 02-28-2008, 04:27 AM

external to internal voltage reg swap

*project 67 sub* · 02-28-2008, 04:51 AM

dont know exactly what its from. just matched the old one to one off the shelf at autozone. the back half looks like the 91 chevy truck alt. but the front half were it mounts up the mounts are at 12 an 6 o' clock

hootz · 02-28-2008, 05:45 AM

from the way you describe it, I think you may have a cs style alternator. If your plug has four terminals in it they should be labled S F L P (providing you have a cs). "S" requires battery voltage (just loop it from the threaded battery terminal on the back) "L" goes to the idiot light in the dash. "F" and "P" are not used. If you have the earlier SI model alternator the link in truckdude239's post will help. Still stuck? maybe this will help http://www.extreme4wheelin.com/tech/...ators/tech.htm

02-28-2008, 02:43 AM	#1
project 67 sub Account Suspended Join Date: Mar 2007 Location: san bernardino ca. everywhere Posts: 3,938	charging system questions i know this is the wrong forum but the electrical forum doesnt get very many people looking at it, and i dont think i seen the answer to the ? that i have. i have a 67 burb that the po changed over to an internal reg. alternator and an h.e.i. distributor. the first ? that i have is the problem that i am having is, is that it shows that the alternator is not charging. up untill about a week and a half ago it would charge fine, now it is not charging at all. the battery seems to be good, the alternator is good and showed that it was charging at autozone when i personally took the alternator in and tested it, but i still changed it to a better one. the other ? that i have is that when i upgraded the alt. i got a 105amp alt. and it has 3 wires that come out were their was originally 2 wires coming out and i dont know exactly what wires go where. their is a red wire(about 10gauge), and a brown and a black wire(about 14gauge) plus the batt. wire on the back of the alt. thanks in adv. this place unlike the other forum that i frequently go on, (for my jetta) --->www.vwvortex.com.<---- they suck and are all sh!+ talkers that are better than every body else. and are haters but anyways like i said thanks.

02-28-2008, 02:54 AM	#2
jay6891 Car Knocker Join Date: May 2001 Location: jefferson,arkansas Posts: 664	Re: charging system questions Let me go out and look @ mine and I'll try to help __________________ 68 c-10,91 sportside bed,350 .030 over,4 bolt,10-1 comp,2.05 intake/1.94 exhaust,1.6 Harland Sharp roller rockers,edelbrock rpm cam and intake w/750 carb, 700r4, 3.73 gears,Jacabbs Electronic Igntion w/Accel HEI distributer and super coil. ZR-1 roll pan, filled tailights. Blazer tank. Hidden hitch. 2 1/2" Flowmaster 40's. Parts bought but not installed>> ford 9" posi with disc. CCP front and rear lowering kit 4/5. Cab corners,foor boards,rockers, cab braces, Phatom grill, Painless wiring kit.

02-28-2008, 03:02 AM	#3
jay6891 Car Knocker Join Date: May 2001 Location: jefferson,arkansas Posts: 664	Re: charging system questions Ok went and looked. My red 10 gauge wire is hooked to the positive on the alternator. The smaller red wire 14 gauge is also hooked to the positive on the alternator and is in position one on the plug. The black wire that I have is alos a 14 gauge in the position two on the plug and is wired to the factory dark blue wire going to alt. Then I have a factory ground wire that is wired to the case of the alt. I have also convetered to a internal reg and hei. Hope this helps. The brown wire? Is it in the facory harness? I beleive that one went to the external reg and is no longer used. I used to have a wiring diagram but it was on my other compter and it crashed and this new one has windows vista on it and my old digi camera won't work with it or I would take a pic. __________________ 68 c-10,91 sportside bed,350 .030 over,4 bolt,10-1 comp,2.05 intake/1.94 exhaust,1.6 Harland Sharp roller rockers,edelbrock rpm cam and intake w/750 carb, 700r4, 3.73 gears,Jacabbs Electronic Igntion w/Accel HEI distributer and super coil. ZR-1 roll pan, filled tailights. Blazer tank. Hidden hitch. 2 1/2" Flowmaster 40's. Parts bought but not installed>> ford 9" posi with disc. CCP front and rear lowering kit 4/5. Cab corners,foor boards,rockers, cab braces, Phatom grill, Painless wiring kit. Last edited by jay6891; 02-28-2008 at 03:06 AM.

02-28-2008, 03:05 AM	#5
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: charging system questions Is it charging ,but not showing on the ammeter? If so check the 4 amp fuses located in eng compartment. One will be by the junction block on RH fender the other by left front of radiator support. Attached Images __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

02-28-2008, 04:10 AM	#7
project 67 sub Account Suspended Join Date: Mar 2007 Location: san bernardino ca. everywhere Posts: 3,938	Re: charging system questions anyone who can help i appreciate it. im kind of slow when it comes to wiring

02-28-2008, 04:33 AM	#8
jay6891 Car Knocker Join Date: May 2001 Location: jefferson,arkansas Posts: 664	Re: charging system questions What are the specs on the new alt? ie whats it fit? Mine is for a 80's model camaro, 105 amps. Where the plug- plugs into the alt are there numbers? That is where I got the number one and two from. The link that truckdude239 gave is how mine is wired. __________________ 68 c-10,91 sportside bed,350 .030 over,4 bolt,10-1 comp,2.05 intake/1.94 exhaust,1.6 Harland Sharp roller rockers,edelbrock rpm cam and intake w/750 carb, 700r4, 3.73 gears,Jacabbs Electronic Igntion w/Accel HEI distributer and super coil. ZR-1 roll pan, filled tailights. Blazer tank. Hidden hitch. 2 1/2" Flowmaster 40's. Parts bought but not installed>> ford 9" posi with disc. CCP front and rear lowering kit 4/5. Cab corners,foor boards,rockers, cab braces, Phatom grill, Painless wiring kit. Last edited by jay6891; 02-28-2008 at 04:35 AM.

02-28-2008, 04:27 AM	#9
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: charging system questions external to internal voltage reg swap __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

02-28-2008, 04:51 AM	#10
project 67 sub Account Suspended Join Date: Mar 2007 Location: san bernardino ca. everywhere Posts: 3,938	Re: charging system questions dont know exactly what its from. just matched the old one to one off the shelf at autozone. the back half looks like the 91 chevy truck alt. but the front half were it mounts up the mounts are at 12 an 6 o' clock

02-28-2008, 05:45 AM	#11
hootz Registered User Join Date: Feb 2008 Location: Rogers, AR Posts: 15	Re: charging system questions from the way you describe it, I think you may have a cs style alternator. If your plug has four terminals in it they should be labled S F L P (providing you have a cs). "S" requires battery voltage (just loop it from the threaded battery terminal on the back) "L" goes to the idiot light in the dash. "F" and "P" are not used. If you have the earlier SI model alternator the link in truckdude239's post will help. Still stuck? maybe this will help http://www.extreme4wheelin.com/tech/...ators/tech.htm __________________ Never say Never!!



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