serpentine belt system - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gundyfan · 02-12-2007, 01:25 PM

I just in stalled a 1999 vortec and keep the serpentine belt system can anyone tell me how to wire up the alternator? I keep the plug that was attached to it when we where at the savage yard.The plug has one wire coming out of the plug.What do i hook it too.will it work with my factory gauge,If so how to wire this system?Thanks Jason

vtblazer · 02-12-2007, 01:31 PM

Should be a brown wire, correct?

You'll want to make sure that you only hook up to a wire from your system that ONLY supplies power when the key is in the run position.

Have you done the one wire alt conversion yet?
If not, check out the FAQ section, there's a great thread about it.

gundyfan · 02-12-2007, 01:32 PM

Also What Upper Radiator Hose Do You Use?

vtblazer · 02-12-2007, 01:33 PM

Quote:

Originally Posted by gundyfan

Also What Upper Radiator Hose Do You Use?

Should be able to use an upper read hose from a 90ish truck, that's what's in mine and it fits really well. (not a vortec motor though)

**Palf70Step** · 02-12-2007, 01:35 PM

I'll be watching this as I need to do mine also. I have the factor GM alternator (probably like you) not the one-wire type. I know there is two wires and that there is a resistor needed for the hookup, but I don't remember the detailes when I looked it up a while back.

As far as the hose, I am told if you use the inline six hose backwards it works pretty well and clears things. Like VT said a 90-95 hose should work too.

vtblazer · 02-12-2007, 01:50 PM

My alt had three wires (90 version) but only the brown is needed.

The other two are not needed for our application.

**Palf70Step** · 02-12-2007, 01:56 PM

VT, Is your's mounted in the back (6 banger or 4wd) position?

gundyfan · 02-12-2007, 01:57 PM

What Does The Brown Wire Hook To?need To See If Anyone Has The Color Of The Wire In The Harness To Hook To?and How Do I Hook It Up The My Original Gauge Will It Work?if So How Do I Hook Up The Gauge Thanks For Any Help

vtblazer · 02-12-2007, 02:40 PM

You should have three wires that went to your old alt.

Red - thick gauge wire that goes to the post on the back of the alt.
Yellow - will have constant 12v power - do not use.
Blue - has key power, hook this one to the brown of your newer style alt.

After you do the one wire alt conversion I spoke of in my first post.

gundyfan · 02-12-2007, 03:23 PM

So let me see if I understand this big red wire is coming from the battery goes on the post on the alternator and the blue wire is coming from the junction box on the fire wall and wired to the brown wire on the plug.will my gauge work is that what the blue wire is for.thanks vtblazer

vtblazer · 02-12-2007, 03:34 PM

Quote:

Originally Posted by gundyfan

So let me see if I understand this big red wire is coming from the battery goes on the post on the alternator and the blue wire is coming from the junction box on the fire wall and wired to the brown wire on the plug.will my gauge work is that what the blue wire is for.thanks vtblazer

Blue wire should be coming from your converted voltage regulator.
The regulator is on the inside of the rad support on the drivers side, under the headlight assembly.

Yes, your Batt./charge gauge should work, mines does in this same configuration.

vtblazer · 02-12-2007, 03:36 PM

Quote:

Originally Posted by Palf70Step

VT, Is your's mounted in the back (6 banger or 4wd) position?

No sure what your referring too, sorry.

My alt?

gundyfan · 02-12-2007, 04:04 PM

I bought this truck with no motor so nothing was hooked up,there is no volt regulator on the rad support it has been removed and wire had been cut and are hiding in side the wiring harness so i unwraped them and found so wire that why I'm wondering if the gauge will work with ou volt regulator.does your's have the volt regulator..

**Palf70Step** · 02-12-2007, 04:34 PM

Quote:

Originally Posted by vtblazer

No sure what your referring too, sorry.

My alt?

No...I am speakin in Monday Language (hosed up). I ment the engine position?

vtblazer · 02-12-2007, 07:26 PM

Quote:

Originally Posted by gundyfan

I bought this truck with no motor so nothing was hooked up,there is no volt regulator on the rad support it has been removed and wire had been cut and are hiding in side the wiring harness so i unwraped them and found so wire that why I'm wondering if the gauge will work with ou volt regulator.does your's have the volt regulator..

Volt regular has been bypassed.

Check out the FAQ section, the thread is in there on how to do it.
Good thread, easy to do.

Your going to need to find out where the harness is hacked or missing and go from there.

Palf...

I'm with ya now.
I believe it's in the 4x4 position, sits back pretty far.
When I was running the older HEI, coil in the cap it was touching the firewall for the most part.

65-72 chevytoys · 02-12-2007, 08:39 PM

Quote:

Originally Posted by vtblazer

Volt regular has been bypassed.

Check out the FAQ section, the thread is in there on how to do it.
Good thread, easy to do.

Bypassing the VR is only for an internally regulated alt. Not the original external regulated alt. Correct?

vtblazer · 02-13-2007, 08:29 AM

Quote:

Originally Posted by 65-72 chevytoys

Bypassing the VR is only for an internally regulated alt. Not the original external regulated alt. Correct?

Correct sir.

Super easy mod and you get better/higher charging capabilities at the same time.

02-12-2007, 01:25 PM	#1
gundyfan Registered User Join Date: Jan 2007 Location: oklahoma Posts: 14	serpentine belt system I just in stalled a 1999 vortec and keep the serpentine belt system can anyone tell me how to wire up the alternator? I keep the plug that was attached to it when we where at the savage yard.The plug has one wire coming out of the plug.What do i hook it too.will it work with my factory gauge,If so how to wire this system?Thanks Jason

02-12-2007, 01:31 PM	#2
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: serpentine belt system Should be a brown wire, correct? You'll want to make sure that you only hook up to a wire from your system that ONLY supplies power when the key is in the run position. Have you done the one wire alt conversion yet? If not, check out the FAQ section, there's a great thread about it.

02-12-2007, 01:32 PM	#3
gundyfan Registered User Join Date: Jan 2007 Location: oklahoma Posts: 14	Re: serpentine belt system Also What Upper Radiator Hose Do You Use?

02-12-2007, 01:35 PM	#5
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: serpentine belt system I'll be watching this as I need to do mine also. I have the factor GM alternator (probably like you) not the one-wire type. I know there is two wires and that there is a resistor needed for the hookup, but I don't remember the detailes when I looked it up a while back. As far as the hose, I am told if you use the inline six hose backwards it works pretty well and clears things. Like VT said a 90-95 hose should work too. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 02-12-2007 at 01:37 PM.

02-12-2007, 01:50 PM	#6
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: serpentine belt system My alt had three wires (90 version) but only the brown is needed. The other two are not needed for our application. Attached Images

02-12-2007, 01:56 PM	#7
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: serpentine belt system VT, Is your's mounted in the back (6 banger or 4wd) position? __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

02-12-2007, 01:57 PM	#8
gundyfan Registered User Join Date: Jan 2007 Location: oklahoma Posts: 14	Re: serpentine belt system What Does The Brown Wire Hook To?need To See If Anyone Has The Color Of The Wire In The Harness To Hook To?and How Do I Hook It Up The My Original Gauge Will It Work?if So How Do I Hook Up The Gauge Thanks For Any Help

02-12-2007, 02:40 PM	#9
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: serpentine belt system You should have three wires that went to your old alt. Red - thick gauge wire that goes to the post on the back of the alt. Yellow - will have constant 12v power - do not use. Blue - has key power, hook this one to the brown of your newer style alt. After you do the one wire alt conversion I spoke of in my first post.

02-12-2007, 03:23 PM	#10
gundyfan Registered User Join Date: Jan 2007 Location: oklahoma Posts: 14	Re: serpentine belt system So let me see if I understand this big red wire is coming from the battery goes on the post on the alternator and the blue wire is coming from the junction box on the fire wall and wired to the brown wire on the plug.will my gauge work is that what the blue wire is for.thanks vtblazer

02-12-2007, 04:04 PM	#13
gundyfan Registered User Join Date: Jan 2007 Location: oklahoma Posts: 14	Re: serpentine belt system I bought this truck with no motor so nothing was hooked up,there is no volt regulator on the rad support it has been removed and wire had been cut and are hiding in side the wiring harness so i unwraped them and found so wire that why I'm wondering if the gauge will work with ou volt regulator.does your's have the volt regulator..



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