Electronics Need help wiring something up? Thinking of adding an electrical component to your car? Need help troubleshooting that wiring glitch?

2 wire alternator to 3 wire alternator

Thread Tools
 
Search this Thread
 
Old Mar 23, 2017 | 08:08 AM
  #1  
Boosted357's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2015
Posts: 33
Likes: 0
From: Texas
Car: 1985 Camaro, 2012 Malibu LTZ
Engine: 357 SBC
Transmission: 350 Turbo
2 wire alternator to 3 wire alternator

Hey everyone. Hoping someone can help. I had a v6 and I am dropping in my carbed v8. But the v6 had the alternator with a 2 prong connector and my v8 has the alternator with a 3 wire connector from i believe a 92 camaro. Does anyone know how I can hook up this alternator since my wiring harness only has the 2 wires? Thanks for the help!
Reply
Old Mar 23, 2017 | 01:44 PM
  #2  
Tuned Performance's Avatar
Sponsor
20 Year Member
Community Builder
Community Influencer
Community Favorite
iTrader: (94)
 
Joined: Dec 2004
Posts: 16,694
Likes: 979
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 2 wire alternator to 3 wire alternator

You may have a si going to a cs
Reply
Old Mar 23, 2017 | 07:47 PM
  #3  
NoEmissions84TA's Avatar
Supreme Member
5 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Feb 2017
Posts: 4,174
Likes: 569
From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: 2 wire alternator to 3 wire alternator

You can get a conversion adapter, or make your own.
You will need a pigtail that fits the new alternator.
See attached.
http://www.wiringdepot.com/store/c/1...s-Sockets.aspx
http://www.hotrod.com/articles/alter...kyard-builder/
Attached Thumbnails 2 wire alternator to 3 wire alternator-conversion.jpg   2 wire alternator to 3 wire alternator-pigtail.jpg  
Reply
Old Mar 23, 2017 | 07:57 PM
  #4  
Boosted357's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2015
Posts: 33
Likes: 0
From: Texas
Car: 1985 Camaro, 2012 Malibu LTZ
Engine: 357 SBC
Transmission: 350 Turbo
Re: 2 wire alternator to 3 wire alternator

Originally Posted by NoEmissions84TA
You can get a conversion adapter, or make your own.
You will need a pigtail that fits the new alternator.
See attached.
http://www.wiringdepot.com/store/c/1...s-Sockets.aspx
http://www.hotrod.com/articles/alter...kyard-builder/

Haha thank you so much i actually just found this adapter like an hour ago. This will make it much easier. Do you know if i buy this adapter what do I do with the wire from the original harness. One wire runs from firewall to connector then the other wire goes from the connector to an eyelet that mounts to the bolt on the back of the alternator. Do i still need to bolt it to that location. Or just leave it disconnected
Reply
Old Mar 23, 2017 | 10:58 PM
  #5  
NoEmissions84TA's Avatar
Supreme Member
5 Year Member
Liked
Loved
Community Favorite
iTrader: (1)
 
Joined: Feb 2017
Posts: 4,174
Likes: 569
From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: 2 wire alternator to 3 wire alternator

View the photos in the HotRod article. They show everything.
Reply
Old Mar 24, 2017 | 01:44 PM
  #6  
Boosted357's Avatar
Thread Starter
Junior Member
 
Joined: Dec 2015
Posts: 33
Likes: 0
From: Texas
Car: 1985 Camaro, 2012 Malibu LTZ
Engine: 357 SBC
Transmission: 350 Turbo
Re: 2 wire alternator to 3 wire alternator

Originally Posted by NoEmissions84TA
View the photos in the HotRod article. They show everything.
OK thanks for the help!
Reply
Old Jun 5, 2018 | 02:38 PM
  #7  
aaron7's Avatar
TGO Supporter
20 Year Member
iTrader: (7)
 
Joined: Nov 2002
Posts: 3,466
Likes: 5
From: MA, USA
Car: 83 bird
Engine: 305/383
Transmission: WC T5
Axle/Gears: 3:42
Re: 2 wire alternator to 3 wire alternator

Bumping this older thread as I'm scratching my head!

Anyone have the schematic for going SI to CS? That diagram is confusing and the HR article just says to buy an adapter or make your own... with no mention of HOW.

I have the 3 pin alt I'm trying to install in my 83 with the 2 pin plug.

I did see they make adapters, but don't see the point in buying one when all I need to do is cut my 2 pin plug off & wire it on to the new alt pigtail.

When looking at the adapters I also see they offer with and without warning light. Does that mean if you DON'T have a voltage gauge and just have an idiot light dash? I assume that'd make a difference in how it's wired up?

http://www.wiringdepot.com/store/p/5...ing-Light.aspx

http://www.wiringdepot.com/store/p/5...ing-Light.aspx
Attached Thumbnails 2 wire alternator to 3 wire alternator-34507528_10212734273415621_6548699093349171200_o.jpg  
Reply
Old Jun 28, 2018 | 02:41 PM
  #8  
funknhostile's Avatar
Junior Member
 
Joined: May 2015
Posts: 3
Likes: 0
Re: 2 wire alternator to 3 wire alternator

Did you get your wiring squared away?
Reply
Old Jun 29, 2018 | 05:30 AM
  #9  
aaron7's Avatar
TGO Supporter
20 Year Member
iTrader: (7)
 
Joined: Nov 2002
Posts: 3,466
Likes: 5
From: MA, USA
Car: 83 bird
Engine: 305/383
Transmission: WC T5
Axle/Gears: 3:42
Re: 2 wire alternator to 3 wire alternator

Sorta. I ordered the adapter WITH the resistor though not sure if that was the right move or not. I'll know soon when the motor runs.
Reply
Old Jun 29, 2018 | 05:12 PM
  #10  
funknhostile's Avatar
Junior Member
 
Joined: May 2015
Posts: 3
Likes: 0
Re: 2 wire alternator to 3 wire alternator

Let me know how it turns out. I may have some advice if you get stuck.
Reply
Old Jul 5, 2018 | 06:00 AM
  #11  
aaron7's Avatar
TGO Supporter
20 Year Member
iTrader: (7)
 
Joined: Nov 2002
Posts: 3,466
Likes: 5
From: MA, USA
Car: 83 bird
Engine: 305/383
Transmission: WC T5
Axle/Gears: 3:42
Re: 2 wire alternator to 3 wire alternator

Thanks, I appreciate it. This swap is taking me forever, keep hitting dumb road blocks like this.

So have you converted? Did you use a resistor? Do you have a gauge or just warning lights?
Reply
Old Jul 5, 2018 | 05:19 PM
  #12  
funknhostile's Avatar
Junior Member
 
Joined: May 2015
Posts: 3
Likes: 0
Re: 2 wire alternator to 3 wire alternator

I am not a fan of the single wire alt. I upgraded to a 140 amp with the oem blade connection. I like to see my gauge working and didn't want another electrical hassle like I had with the crossfire ignition.
Reply




All times are GMT -5. The time now is 08:32 AM.