• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

100Amp 1 wire Alt questions!! Please help!

  • Thread starter Thread starter Ny Mustang Guy
  • Start date Start date May 8, 2006

Ny Mustang Guy

Founding Member
Dec 10, 2001
322
0
0
Queens Nyc
May 8, 2006
#1
  • May 8, 2006
  • #1
:SNSign: Alright... I just got a 100Amp 1 Wire alternator off a friend.. The ORIGINAL alt that I had in the car was a 3 post 61amp alt w/ external regulator. My Stock Alt had only a green wire w. stripe and red wire to the alt on it... My friend said if I want to I can connect that to the number 1 post (my alt has a rubber cap I can take off that has 2 posts on it)

My battery is relocated to the back.. and I have the wire going from the back of the car to the silinoid.

Questions I Have:
1. Do I put the Green wire to the number 1 post (using a female connector) like he said or can I not use it at all?
2. Can I run the power wire off the alternator to the silinoid at the same spot the battery wire is going to? (it worked last night when I did that perfectly)
3. My Alternator is shrieking like all hell.. He says its because it has been sitting for a cpl months and to spray it with wd40...and let it run and the shriek will go away.. is this true?
My Alt only works (*works damn well*) when there is a good engine to chassis ground...
4. should I ground the engine to the chassis (whats the best spot?) or ground the alternator (the alt has a spot in the back for a bolt for a ground) to the chassis? any diff? (I think either way the alt gets grounded..)

Thanks alot!

After this.. the next journey I have is to try to get autozone to take back the stock alt I just bought without the pulley on it LOL (I have a nice pulley on mine so i didnt want to give it away.. so i swapped pulleys off the new one to the old one.. then I got a hold of this 100amp alternator off my friend which didnt have a pulley.. thus now the new stock alt I have has no pulley)
 

Ny Mustang Guy

Founding Member
Dec 10, 2001
322
0
0
Queens Nyc
May 8, 2006
#2
  • May 8, 2006
  • #2
ttt
 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0
Nov 19, 2005
815
5
18
mooresville, nc
May 19, 2006
#3
  • May 19, 2006
  • #3
if its a 1 wire alternator you dont need anything else hooked up to it. all you have to do i hook the power wire to it and start the car up and use a screw driver or something to excite the alternator. it will stay excited as long as the battery stays connected.
 
You must log in or register to reply here.

Similar threads

3
Electrical Starter solenoid green wire?
  • 387lx
  • Jun 1, 2026
  • Fox 5.0 Mustang Tech
Replies
3
Views
134
Fox 5.0 Mustang Tech Jun 2, 2026
AeroCoupe
Electrical 91 hatch wiring help needed
  • FastDriver
  • Apr 7, 2026
  • Fox 5.0 Mustang Tech
Replies
2
Views
146
Fox 5.0 Mustang Tech Apr 8, 2026
FastDriver
Electrical Ron Francis Headlight / Alternator Harness
  • dan50
  • Apr 30, 2026
  • Fox 5.0 Mustang Tech
Replies
0
Views
204
Fox 5.0 Mustang Tech Apr 30, 2026
dan50
Electrical Going crazy trying to identify burnt and disconnected wires 83 GLX5.0
  • x_man586
  • Jun 25, 2025
  • Fox 5.0 Mustang Tech
Replies
6
Views
363
Fox 5.0 Mustang Tech Jun 26, 2025
AeroCoupe
C
Electrical HELP! 1989 5.0 Stick, Voltage Bleed onto Ignition Trigger wire
  • ChickenDeluxe
  • May 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
200
Fox 5.0 Mustang Tech May 24, 2026
ChickenDeluxe
C
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
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?