• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-

3G Alts - One Wire

  • Thread starter Thread starter DocG
  • Start date Start date Mar 21, 2009

DocG

5th graders > me. They're not bant
Sep 25, 2005
8,297
1,358
194
Cincinnati area
Mar 21, 2009
#1
  • Mar 21, 2009
  • #1
Does anyone run a one-wire alternator? Time to upgrade since my alt is crapping out.

I've found some 3G's on Ebay for $90......160amp. Seems easy enough to get the 1-wire and just run the power cable to the solenoid.

Any good/bad luck with these? Did you just tape off and hide the original harnesses?

My other option is to just buy a brand new 3G and do the wire splicing. But a new one at a parts store is twice as much. Don't really want a junkyard one, rather know its going to last a while.

Thanks!
 

BlownFiveLiter

have car, will race....wait, it doesn't run
15 Year Member
Nov 29, 1999
3,133
18
108
Chicagoland
Mar 21, 2009
#2
  • Mar 21, 2009
  • #2
Not sure if it's still an issue nowadays, but I've heard problems with one wire alternators needing to get some pretty good RPM before they excite enough to put out any voltage.
 

DocG

5th graders > me. They're not bant
Sep 25, 2005
8,297
1,358
194
Cincinnati area
Mar 21, 2009
#3
  • Mar 21, 2009
  • #3
Hmmmm....that's what I was cautious of.


Although I did just call my local pick and pull junk yard.

They said they have plenty of cars on the lots with 3G's......$25 for the alternator.

Seems like a pretty dang good option to me!

Might just go Monday and take a look see.....bring a couple wrenches and some wire cutters.
 

BlownFiveLiter

have car, will race....wait, it doesn't run
15 Year Member
Nov 29, 1999
3,133
18
108
Chicagoland
Mar 21, 2009
#4
  • Mar 21, 2009
  • #4
You shouldn't need the wire cutters unless you want to grab the pigtail off the harness. Otherwise, for $25 you should grab a couple. Having a spare is nice if you have one crap out.
 

aar0s

Founding Member
Dec 20, 1998
1,015
55
69
Mar 21, 2009
#5
  • Mar 21, 2009
  • #5
i have the one wire setup and am glad that i did it. I took a 130 amp to the local auto electric place and had a self exciteing regulator put in it then bought a kit from 50resto (i think, cant really remember) that had like a 4ga wire with a big ass inline fuse. tucked the stock harness under the air box and ran the new wire in front of the rad. and behind the battery tucking the fuse in behind the front fender. easy peasy and it works super. i dont have any problems with a charge at rpm's as low as 750 with a underdrive pulley.
 
You must log in or register to reply here.

Similar threads

F
Electrical From scratch: alternator wiring
  • fox racer v2
  • Jun 23, 2025
  • Fox 5.0 Mustang Tech
Replies
0
Views
642
Fox 5.0 Mustang Tech Jun 23, 2025
fox racer v2
F
Resolved 93 Mustang 5.0 - Cranks but does not start
  • dan50
  • Jul 18, 2026
  • Fox 5.0 Mustang Tech
Replies
6
Views
363
Fox 5.0 Mustang Tech Jul 18, 2026
dan50
What's your tow rig?
  • LILCBRA
  • May 31, 2026
  • Other Auto Tech
Replies
6
Views
298
Other Auto Tech Oct 4, 2026
JD1964
Electrical Inaccessible starter solenoid from wire tuck, what are my options for an alternator upgrade?
  • AnthonyA1234
  • Jan 16, 2025
  • Fox 5.0 Mustang Tech
Replies
17
Views
1K
Fox 5.0 Mustang Tech Feb 8, 2025
Mindseye007
J
Progress Thread Family member 1989 GT- Backstory and updates
  • JRC99
  • Apr 19, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
15
Views
1K
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 26, 2025
JRC99
J
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?