CS-130 alternator help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Blue68 · 05-06-2002, 10:25 AM

I've recently swapped a 98 350 and accessories out of a Z71 into my '68. I'm currently trying to determine what the voltage INTO the alternator should be to excite it. I know if I put in 12v it charges, but on my '97 Lumina, I only measure 10 volts into the alternator.

When I put in the 12 volts into the truck alternator, I get 14 volts. Is this too much voltage?

*Randy70C-10* · 05-06-2002, 10:27 AM

14 volts is normal.

tom hand · 05-06-2002, 10:36 AM

Should just be battery volts from an ACCESSORY source. Must come from the accessory side of the key switch. If it comes from the ignition side, it will backfeed the ignition and you can't turn the motor off with the key. Just an extra note.

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72 GMC Sierra SWB almost finished---- 84 Softail
Olive Branch MS

Blue68 · 05-07-2002, 10:57 PM

Can anyone tell me how to wire it? Which pin(s) get voltage? I've feel like I've got a snake by one end but am not sure if it is the correct one. One source that provides great detail is http://www.alternatorparts.com/cs130_sbpage1.htm but it doesn't actually provide specific guidance on doing a one-wire conversion.

tom hand · 05-08-2002, 10:14 AM

According to the stuff you provided fig 3 is the most simple way to hook it up. It is not true one wire hook-up it wants an idiot light to work but I would just hook it up that way. If you are running gauges and do not need the light just hide it under the dash.

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72 GMC Sierra SWB almost finished---- 84 Softail
Olive Branch MS

Blue68 · 05-08-2002, 10:21 AM

Thanks Tom,
You're right, I'm not really looking for a one-wire hookup, just a correct one for this alternator (probably two-wire). What you suggest is what I've gone with so far. I'm mostly looking for validation.

Now I've got to determine which wire is truly the L wire.

05-06-2002, 10:25 AM	#1
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	CS-130 alternator help I've recently swapped a 98 350 and accessories out of a Z71 into my '68. I'm currently trying to determine what the voltage INTO the alternator should be to excite it. I know if I put in 12v it charges, but on my '97 Lumina, I only measure 10 volts into the alternator. When I put in the 12 volts into the truck alternator, I get 14 volts. Is this too much voltage? __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

05-06-2002, 10:36 AM	#3
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	Should just be battery volts from an ACCESSORY source. Must come from the accessory side of the key switch. If it comes from the ignition side, it will backfeed the ignition and you can't turn the motor off with the key. Just an extra note. ------------------ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

05-07-2002, 10:57 PM	#4
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	Can anyone tell me how to wire it? Which pin(s) get voltage? I've feel like I've got a snake by one end but am not sure if it is the correct one. One source that provides great detail is http://www.alternatorparts.com/cs130_sbpage1.htm but it doesn't actually provide specific guidance on doing a one-wire conversion. __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

05-08-2002, 10:14 AM	#5
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	According to the stuff you provided fig 3 is the most simple way to hook it up. It is not true one wire hook-up it wants an idiot light to work but I would just hook it up that way. If you are running gauges and do not need the light just hide it under the dash. ------------------ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

05-08-2002, 10:21 AM	#6
Blue68 Registered User Join Date: Apr 2000 Location: Frisco, Tx, USA Posts: 606	Thanks Tom, You're right, I'm not really looking for a one-wire hookup, just a correct one for this alternator (probably two-wire). What you suggest is what I've gone with so far. I'm mostly looking for validation. Now I've got to determine which wire is truly the L wire. __________________ http://home.comcast.net/~r.landrum/w...tos.html-.html '68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.

05-06-2002, 10:27 AM	#2
Randy70C-10 Account Suspended Join Date: Mar 2001 Location: Virginia Beach, Va. U.S.A. Posts: 15,320	14 volts is normal.



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