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Electrical 3G alternator install

  • Thread starter Thread starter a50ina50
  • Start date Start date Jul 13, 2018

a50ina50

Member
May 31, 2016
69
5
8
Jul 13, 2018
#1
  • Jul 13, 2018
  • #1
*****Kinda need an answer ASAP*****

I am in the process of installing a 3G alternator into my 87 Notch. It had the original 2G. I cut the wires for the output plug (2 black with orange stripes and 1 white wire with black stripe). I pulled back the plastic loom and tape. The 2 black wires connected to another (1) black with orange stripe wire which was the same size wire. They were half assed joined at the factory. The three wires came apart. My question is can I just use one of the black wires with the eyelet connector onto the alternator. Or do I somehow have to connect the 3 wires back together again? Which looks to be a pain in the ass.
 

JD1964

there is enough sticking out to grab on to
15 Year Member
Jun 28, 2013
3,427
1,519
194
Maryland
Jul 13, 2018
#2
  • Jul 13, 2018
  • #2
https://www.stangnet.com/mustang-forums/threads/3g-alternator-install-a-how-to.646825/#post-6673702
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,176
17,879
224
Massachusetts
Jul 13, 2018
#3
  • Jul 13, 2018
  • #3
Only the white wire gets reused. You'll need a stator plug to solder to it to plug into the alt.

Two black 10g wires at the alt get taped up. You want to run a nice big charging wire from the charge post to the starter solenoid.
 
Reactions: mikestang63

mikestang63

SN Certified Technician
Aug 27, 2012
11,606
8,859
214
In the garage
Jul 13, 2018
#4
  • Jul 13, 2018
  • #4
^ this. Do NOT reuse the stock 10g power wires. Only reuse the stator wire and the D shaped Plug. Run a dedicated 4g power wire with a 150 amp fuse from the solenoid to the post on the 3g. Been done 1000 times this way.
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
27,844
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polk county florida
Jul 13, 2018
#5
  • Jul 13, 2018
  • #5
https://www.stangnet.com/mustang-forums/resources/3g-alternator-fox-upgrade.18/
Everything you need to know right here
 
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