simple 3g wiring question

superbean · April 20th, 2009, 01:49 PM

Wanting to do a 3g swap here soon..

On the 3 g, it has a 3 wire plug, stator plug, power wire and ground.

Ground is ground
Power wire is a 4g to solenoid
Stator wire runs to middle wire on plug
Left (yellow) wire runs to 12v
Green goes to dummy light...

But that's where I get confused. Can the green just use any 12v wire, or where do I need to run that to? My factory charging harness is garbage, so any help would be very useful.

All I have left to get my car on the road is the charging system and clutch... please help!

superbean · April 21st, 2009, 02:26 PM

bueller?

89LX347 · April 21st, 2009, 06:58 PM

if you are talking about a key switched item, then find a fuse that has power when the key is on and strip your wire, put it in the fuse hole and put the fuse back in.

superbean · April 21st, 2009, 08:55 PM

right right, but i've read on some write ups about a 500ohm resistor running in parallel with the warning light?

im lost lol

ryans88gt · April 22nd, 2009, 06:07 PM

It has to go to the green wire or your voltage regulator will not work due to the resistor thing in the gauge lite.

Basically the wight wire goes right back to the alternator stator and the thick wires go to the back. Green needs to hook up to the green wire in your alternator wiring. and yellow can just go back to the alternator + post, but you should put a fusible link in. Also make sure you use a fusible link or mega fuse in the 4 ga charging wire. If you ever blow a alt diode pack the fuse will blow before your car starts on fire, which is good.

1slo5.0 · April 22nd, 2009, 07:28 PM

Originally Posted by superbean

Wanting to do a 3g swap here soon..

On the 3 g, it has a 3 wire plug, stator plug, power wire and ground.

Ground is ground
Power wire is a 4g to solenoid
Stator wire runs to middle wire on plug
Left (yellow) wire runs to 12v
Green goes to dummy light...

But that's where I get confused. Can the green just use any 12v wire, or where do I need to run that to? My factory charging harness is garbage, so any help would be very useful.

All I have left to get my car on the road is the charging system and clutch... please help!

I'm confused, where is this green wire coming from? The D shaped connector is the same as the fox body connector so you can use the one on the car without modifying it or the wires. The rectangle connector is the only one you need to modify.

89lx · April 22nd, 2009, 08:11 PM

darrell you wouldnt have a wire diagram for the 3g alt would you?

flamed 98 gt · April 22nd, 2009, 09:13 PM

I just did this yesterday and it only took about 20 minutes. I ordered this from PA Performance. No need to use the factory wiring harness.
PA-Performance is dedicated to offering high quality products to every consumer utilizing the Internet. - PA Performance - You Only Buy Quality Once ! 1.877.471.8010

baine21225 · April 22nd, 2009, 09:28 PM

Originally Posted by flamed 98 gt

I just did this yesterday and it only took about 20 minutes. I ordered this from PA Performance. No need to use the factory wiring harness.
PA-Performance is dedicated to offering high quality products to every consumer utilizing the Internet. - PA Performance - You Only Buy Quality Once ! 1.877.471.8010

well that looks fancy dancy

flamed 98 gt · April 22nd, 2009, 09:40 PM

It was very easy to install.

1slo5.0 · April 22nd, 2009, 11:24 PM

Originally Posted by 89lx

darrell you wouldnt have a wire diagram for the 3g alt would you?

I don't have a wiring diagram but I can explain how to wire it if that helps? Its real easy.

1slo5.0 · April 22nd, 2009, 11:26 PM

Originally Posted by flamed 98 gt

I just did this yesterday and it only took about 20 minutes. I ordered this from PA Performance. No need to use the factory wiring harness.
PA-Performance is dedicated to offering high quality products to every consumer utilizing the Internet. - PA Performance - You Only Buy Quality Once ! 1.877.471.8010

Have you run it much since the install? How do you like it? I've had a few self exciting (one wire) alternators and hated them. My experience has been at idle they charge very little if at all. Hopefully what you have is better than the Chevy style alternators that I've used.

baine21225 · April 22nd, 2009, 11:31 PM

Originally Posted by Darrell

Have you run it much since the install? How do you like it? I've had a few self exciting (one wire) alternators and hated them. My experience has been at idle they charge very little if at all. Hopefully what you have is better than the Chevy style alternators that I've used.

so you like adapters like this?

PA-Performance is dedicated to offering high quality products to every consumer utilizing the Internet. - PA Performance - You Only Buy Quality Once ! 1.877.471.8010

1slo5.0 · April 22nd, 2009, 11:53 PM

Originally Posted by baine21225

so you like adapters like this?

PA-Performance is dedicated to offering high quality products to every consumer utilizing the Internet. - PA Performance - You Only Buy Quality Once ! 1.877.471.8010

Yeah, if you have a 2 wire regulator but as far as I know all 87-93 Mustangs are 3 wire. No adapter harness is needed for a 3G on an 87-93 Mustang.

ryans88gt · April 22nd, 2009, 11:57 PM

Will not work correctly without the green wire and 500 ohm resistor unless it is built to work without it (i.e. self exciting one wire deal).

1slo5.0 · April 23rd, 2009, 12:07 AM

Originally Posted by ryans88gt

Will not work correctly without the green wire and 500 ohm resistor unless it is built to work without it (i.e. self exciting one wire deal).

All of that is already in place on 87-93 Mustangs so I'm still confused. I'm wondering if he cut the original plug off and threw it away.

Superbean, what year is your car? And please help with my confusion...

superbean · April 23rd, 2009, 12:27 AM

The car is a 1988 2.3 lx..

Stock harness fits the alternator fine, just a bit tight, but it should work. It's not working though, so I just wanted to bypass all the factory wiring as I've rewired everything else from scratch.

Ignition, Fuel pump, fans, Push start are all controlled by made from scratch relays, so why not an independent alternator. lol

superbean · April 23rd, 2009, 12:47 AM

well i went ahead and ordered a 3g alternator setup with a one wire regulator.

Since pa perf and late model resto make replacement 1 wire volt regualtors, i'll just go that route.

ryans88gt · April 23rd, 2009, 12:54 AM

yeah, the only wire you have to modify is the white wire to go to the stator plug and the thick wires to the back of the alt.

But if that isn't working, maybe the problem is in one of the fusible links.

The one wire set-up will work. Make sure you use a megafuse or fusible link on that one wire.

superbean · April 23rd, 2009, 01:29 AM

Alright, thanks for your help everyone!

Alternator should be here by the weekend so I'll let you guys know how it goes

April 20th, 2009, 01:49 PM	#1
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	simple 3g wiring question Wanting to do a 3g swap here soon.. On the 3 g, it has a 3 wire plug, stator plug, power wire and ground. Ground is ground Power wire is a 4g to solenoid Stator wire runs to middle wire on plug Left (yellow) wire runs to 12v Green goes to dummy light... But that's where I get confused. Can the green just use any 12v wire, or where do I need to run that to? My factory charging harness is garbage, so any help would be very useful. All I have left to get my car on the road is the charging system and clutch... please help! __________________ weeee foooord!

April 21st, 2009, 02:26 PM	#2
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	bueller? __________________ weeee foooord!

April 21st, 2009, 06:58 PM	#3
89LX347 Hardcore Enthusiast Join Date: Apr 2007 Posts: 1,304 iTrader: 0 reviews	if you are talking about a key switched item, then find a fuse that has power when the key is on and strip your wire, put it in the fuse hole and put the fuse back in. __________________ I believe in art when it is not seen. I believe in music when it is not audible. I believe in God when He is silent.

April 21st, 2009, 08:55 PM	#4
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	right right, but i've read on some write ups about a 500ohm resistor running in parallel with the warning light? im lost lol __________________ weeee foooord!

April 22nd, 2009, 06:07 PM	#5
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	It has to go to the green wire or your voltage regulator will not work due to the resistor thing in the gauge lite. Basically the wight wire goes right back to the alternator stator and the thick wires go to the back. Green needs to hook up to the green wire in your alternator wiring. and yellow can just go back to the alternator + post, but you should put a fusible link in. Also make sure you use a fusible link or mega fuse in the 4 ga charging wire. If you ever blow a alt diode pack the fuse will blow before your car starts on fire, which is good. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

April 22nd, 2009, 08:11 PM	#7
89lx Regular 1989 LX coupe 5.0L Join Date: Dec 2007 Location: NS Canada Posts: 496 iTrader: 0 reviews	darrell you wouldnt have a wire diagram for the 3g alt would you? __________________

April 22nd, 2009, 09:13 PM	#8
flamed 98 gt Regular 1990 5.0 LX Notch Join Date: Sep 2006 Location: The Colony, TX Posts: 375 iTrader: 0 reviews	I just did this yesterday and it only took about 20 minutes. I ordered this from PA Performance. No need to use the factory wiring harness. PA-Performance is dedicated to offering high quality products to every consumer utilizing the Internet. - PA Performance - You Only Buy Quality Once ! 1.877.471.8010

April 22nd, 2009, 09:40 PM	#10
flamed 98 gt Regular 1990 5.0 LX Notch Join Date: Sep 2006 Location: The Colony, TX Posts: 375 iTrader: 0 reviews	It was very easy to install.

April 22nd, 2009, 11:57 PM	#15
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	Will not work correctly without the green wire and 500 ohm resistor unless it is built to work without it (i.e. self exciting one wire deal). __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

April 23rd, 2009, 12:27 AM	#17
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	The car is a 1988 2.3 lx.. Stock harness fits the alternator fine, just a bit tight, but it should work. It's not working though, so I just wanted to bypass all the factory wiring as I've rewired everything else from scratch. Ignition, Fuel pump, fans, Push start are all controlled by made from scratch relays, so why not an independent alternator. lol __________________ weeee foooord!

April 23rd, 2009, 12:47 AM	#18
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	well i went ahead and ordered a 3g alternator setup with a one wire regulator. Since pa perf and late model resto make replacement 1 wire volt regualtors, i'll just go that route. __________________ weeee foooord!

April 23rd, 2009, 12:54 AM	#19
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	yeah, the only wire you have to modify is the white wire to go to the stator plug and the thick wires to the back of the alt. But if that isn't working, maybe the problem is in one of the fusible links. The one wire set-up will work. Make sure you use a megafuse or fusible link on that one wire. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

April 23rd, 2009, 01:29 AM	#20
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	Alright, thanks for your help everyone! Alternator should be here by the weekend so I'll let you guys know how it goes __________________ weeee foooord!

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