Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1948 - 1956 F1, F100 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-10-2012, 02:22 AM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
3G alternator wiring clarification

I have a 95amp 3G alternator mounted, from a F150/Bronco. The wiring threads I've been reading have confused me. Hopefully someone can make this simple for me.

On the internal regulator terminals they are labeled as: A, S, I.

A - gets connected to the terminal that will be connected directly to the battery using an 8 gauge piece of wire, to charge the batt. (yellow line in pic)

S - Gets connected to one of the screws that on the plastic (regularator chip?) cover. Those say "ground here to test". (green line in pic)

I - not used? (blue line in pic)

Click the image to open in full size.

What about the old voltage regulator and the connections to it? Pull it and the wires?

This can't be that simple. Please enlighten me before I do something dumb.

Thanks in advance!
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
  #2  
Old 09-10-2012, 05:53 AM
sdetweil's Avatar
sdetweil sdetweil is offline
Post Fiend
 
Join Date: Nov 2000
Location: Liberty Hill, tx
Posts: 9,472
sdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud of
this diagram should help..

note the fuse between the red and yellow leads at the battery
this lets the yellow lead know if the fuse blows, and cuts the alternator output..

also note the light green/red lead used to indicate power on. notice the resistors in line.. won't work without it

this worked on a 95 amp like yours, and my 160 amp.

and u don't use the old regular, this has it built in

Sam
Attached Images
 
__________________
Sam

1955 F100 460/c6, 3.55ls - 436 hp, 489 tq
2012 F350 4x4, DRW, 3.73ls, CC, LB, 400 hp, 800 tq
2013 Keystone Alpine 3720FB 5th wheel. 40', 15,500gvwr
Reply With Quote
  #3  
Old 09-10-2012, 05:58 AM
GreatNorthWoods's Avatar
GreatNorthWoods GreatNorthWoods is offline
Post Fiend
 
Join Date: Apr 2002
Location: Littleton, New Hampshire
Posts: 8,062
GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.
Here's something that may help...

Click the image to open in full size.
__________________
Vern

1949 F-1
Reply With Quote
  #4  
Old 09-10-2012, 06:52 AM
jniolon's Avatar
jniolon jniolon is offline
Postmaster
 
Join Date: Jul 1997
Location: Beautiful Hueytown Alabam
Posts: 3,222
jniolon is a splendid one to beholdjniolon is a splendid one to beholdjniolon is a splendid one to beholdjniolon is a splendid one to beholdjniolon is a splendid one to beholdjniolon is a splendid one to beholdjniolon is a splendid one to behold
Boz,

here's a link to MAD electronics.... really good tech on alternators... 1 wire vrs 3 wire and some good sound information... look around the site some for some other cool stuff too

this might help

john

MadElectrical.com - Electrical Tech
__________________
my stuff.....
jniolon.classicpickup.com
Reply With Quote
  #5  
Old 09-11-2012, 01:55 AM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
Thank you Sam, Vern, and John!
That's exactly what I needed. The only thing I'm missing now is the inline fuse.
Also...the diagram says 6ga for the charging wire...is that really necessary? I have a roll of 8ga and I know I've seen 10ga in another truck.

Thanks again.
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
  #6  
Old 09-11-2012, 06:44 AM
GreatNorthWoods's Avatar
GreatNorthWoods GreatNorthWoods is offline
Post Fiend
 
Join Date: Apr 2002
Location: Littleton, New Hampshire
Posts: 8,062
GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.
Quote:
Originally Posted by Bozworth View Post
Thank you Sam, Vern, and John!
That's exactly what I needed. The only thing I'm missing now is the inline fuse.
Also...the diagram says 6ga for the charging wire...is that really necessary? I have a roll of 8ga and I know I've seen 10ga in another truck.

Thanks again.
Depends on the output of your alternator. I think the 8 gauge would work for anything up to 100 Amps...
__________________
Vern

1949 F-1
Reply With Quote
  #7  
Old 09-11-2012, 07:23 AM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
Thanks Vern.
It's the 95 amp 3G, so I should be fine with the 8ga.
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
  #8  
Old 09-11-2012, 08:17 AM
sdetweil's Avatar
sdetweil sdetweil is offline
Post Fiend
 
Join Date: Nov 2000
Location: Liberty Hill, tx
Posts: 9,472
sdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud ofsdetweil has much to be proud of
Quote:
Originally Posted by Bozworth View Post
Thanks Vern.
It's the 95 amp 3G, so I should be fine with the 8ga.
my diagram says 8ga for 130amp

Sam
__________________
Sam

1955 F100 460/c6, 3.55ls - 436 hp, 489 tq
2012 F350 4x4, DRW, 3.73ls, CC, LB, 400 hp, 800 tq
2013 Keystone Alpine 3720FB 5th wheel. 40', 15,500gvwr
Reply With Quote
  #9  
Old 09-23-2012, 12:20 AM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
Almost done.
All wired up and I'm only missing the in-line fuse. Can someone educate me on that? I've seen the inline fuses rated anywhere from 60a to the 175a mega fuse like in the diagram.
For a 95 amp alternator, would the 175a fuse be too much fuse?
Why is the fuse rated so much higher than the output of the alt?
Won't the wiring, battery, and alternator cook-off before that fuse pops?
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
  #10  
Old 09-23-2012, 05:31 AM
GreatNorthWoods's Avatar
GreatNorthWoods GreatNorthWoods is offline
Post Fiend
 
Join Date: Apr 2002
Location: Littleton, New Hampshire
Posts: 8,062
GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.
I assume you are referring to a fusable link. I've never used one but if you feel safer doing so put it in the Bat wire between the alternator and the Ammeter or alternator and starter solenoid. I'd use something like 12 to 14 gauge wire since you are using 8 gauge for the Bat wire.
__________________
Vern

1949 F-1
Reply With Quote
  #11  
Old 10-15-2012, 04:26 PM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
So I reconnected the battery wire on this today, and while making sure all the bolts were tight I touched the alternator, and it was hot. (it sat for about 2 hours with the batt. connected before I noticed the heat issue on the alt.) Truck has not been started. I measured the temp on the alt. housing and it was at 120 degrees. From just sitting there.

I do not have the mega fuse installed.
The charging wire runs directly from the post on the alternator, to the battery post. (8ga wire)

I removed the charging wire at the alternator, and the temp has dropped down to 92 degrees in about an hour.

So, should I cut the charging cable and connect it to the hot side of the solenoid?

Because there is no megafuse, is that causing the current to flow into the alternator and the resulting heat?
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
  #12  
Old 10-16-2012, 12:10 AM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
More info...

It's not the charging wire.
I've had ONLY that wire connected to the alt. for the last couple of hours, the temp hasn't changed. Voltage on alternator post is 12.3.

Voltage on the "A" (regulator) connection wire (blue colored wire) that runs to the "hot" side of the solenoid is 12.3.

Voltage on the "I" (regulator) connection wire (brown colored wire) that runs to the ignition/keyswitch is 12.3.

The ground from the alt to the frame is tight, and on bare metal at the frame.
All the above voltage readings were taken using this ground point.
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
  #13  
Old 10-16-2012, 07:06 AM
GreatNorthWoods's Avatar
GreatNorthWoods GreatNorthWoods is offline
Post Fiend
 
Join Date: Apr 2002
Location: Littleton, New Hampshire
Posts: 8,062
GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.GreatNorthWoods has a very good reputation on FTE.
Wish I could help but I'm lost. Don't know what you have going on there unless the alternator possibly has an internal short. Maybe someone else has an idea...
__________________
Vern

1949 F-1
Reply With Quote
  #14  
Old 10-17-2012, 02:25 PM
Bozworth Bozworth is offline
Senior User
 
Join Date: Aug 2011
Location: Round Rock, TX
Posts: 230
Bozworth is gaining momentum as a positive member of FTE.
Fixed.
The wire that was connected to the "I" terminal on the alternator internal regulator was supposed to go to the ignition post on the keyswitch. It was actually on the "batt" terminal of the keyswitch. Moved that connection over and monitored it for a few hours, no change in the temp on the alt.

Once the battery charges up, I expect her to fire right up.
__________________

1954 F100 Deluxe
300ci w/3sp+OD
Reply With Quote
Old 10-17-2012, 02:25 PM
 
 
 
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1948 - 1956 F1, F100 & Larger F-Series Trucks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
3G Alternator Install With Pictures bghnkinf250 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 77 09-22-2014 07:49 AM
2 gauge battery charge cable and alternator pigtail write up strokin'_tatsch 1994.5 - 1997 7.3L Power Stroke Diesel 32 06-12-2013 12:21 PM
Regulator problem 1930 Dodge 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks 17 12-27-2012 03:35 PM
HOWTO - 3G Alternator Installation ctubutis '80-'86 HOWTO's 0 01-20-2011 09:09 PM
3G alternator in early Bronco mauicruza 1966 - 1977 Early Broncos 4 04-30-2005 05:00 PM



All times are GMT -5. The time now is 03:54 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup