Last Minute Ignition/Alternator wiring - JeepForum.com
 
LinkBack Thread Tools
post #1 of 10 Old 10-07-2013, 08:29 PM Thread Starter
WolfcreekCJ
Registered User
1977 CJ7 
 
Join Date: Apr 2011
Location: Wolfcreek
Posts: 147
Last Minute Ignition/Alternator wiring

I have been using a wiring diagram to upgrade my 1977 prestolite to an 82 Duraspark using parts from a donor jeep. I'm fairly confident with this swap as drawn. I run into a problem when I also want to upgrade my alternator to the Delco that also came with the donor. The factory diagrams for each vehicle don't Jibe so its hard to trace. Namely the brown resistor wire from the delco ends at a terminal block on the factory diagram. The Motorola Alternator wiring remains intact with its external voltage regulator. The Diagram for the duraspark upgrade uses this voltage regulator. Am I to understand that the delco alternator is internally regulated? If so , Do I need to lose the original voltage regulator and the accompanied wiring? If so , my ignition swap diagram goes to S**t. I Have searched in vain for the JeepHammer/Junkyardgenius alternator swap diagrams that spell this out. I understand that I could use a resistor /diode in place of the resistor wire. Part#? or what to ask the parts man for. Its Late here, Maybe some of you guys out west can answer this or point me in some direction/link.

Attached Images
 

All it takes is time and money
WolfcreekCJ is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 10-07-2013, 08:49 PM Thread Starter
WolfcreekCJ
Registered User
1977 CJ7 
 
Join Date: Apr 2011
Location: Wolfcreek
Posts: 147
Here is a poor attempt to ask an seemingly easy question. The Alternator is a "One poster " OE from the 82 I THINK. Im having trouble with posting a picture because the file is too large and its too late in the evening and my eyes are too bleary to figure it out.
Attached Thumbnails
ALTERNATOR.jpg  

All it takes is time and money
WolfcreekCJ is offline  
post #3 of 10 Old 10-08-2013, 07:47 AM
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert
Posts: 16,348
Wolf,

It appears The Hammer's "Junkyard Genius" website, with all his handy diagrams, no longer exists. Bummer.

I'll take a stab at your question, but be forewarned, electrical is NOT my forte'. Hopefully John Strenk will chime in....

The Delco alternator is internally regulated, so the old external regulator and related wiring goes away. Below is the best diagram I could find of the Delco wiring. Note, this diagram shows the #2 sensing wire looping back to the battery terminal on the alternator. This article indicates that this configuration is OK, but not ideal. Instead, they suggest to run the sensing wire from #2 to the + terminal post on the solenoid.

Hope this helps,

Matt
Attached Images
 
Matt1981CJ7 is offline  
post #4 of 10 Old 10-08-2013, 08:08 AM Thread Starter
WolfcreekCJ
Registered User
1977 CJ7 
 
Join Date: Apr 2011
Location: Wolfcreek
Posts: 147
Thanks Matt, This Helps . Off to work , but at least I can buy the diode now . With the external voltage regulator gone, I just need to hook up the resistor wire correctly. sorry for the wordy post it was late and I was frustrated.

All it takes is time and money
WolfcreekCJ is offline  
post #5 of 10 Old 10-08-2013, 08:21 AM
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert
Posts: 16,348
You might want to pick up a fusible link, as well.

Matt
Matt1981CJ7 is offline  
post #6 of 10 Old 10-08-2013, 07:30 PM Thread Starter
WolfcreekCJ
Registered User
1977 CJ7 
 
Join Date: Apr 2011
Location: Wolfcreek
Posts: 147
I have hooked up the wiring as per accompanied drawing. While fooling with some dash wires and headlights etc. the key was left in the run position and the resistor pot became Extremely hot. I s this normal? Would some Wiring Guru please check this diagram to see where the mistakes lie , if any. My jeep is wired exactly as shown here. The alternator has not been wired to a dedicated ground. Is this absolutely necessary or just a good idea. I am a day or so from trying to fire this POS and am concerned about that resistor pot burning up or frying the ignition box or something else. Thanks for taking the time to look.
Attached Thumbnails
ALTERNATOR wires.jpg  

All it takes is time and money
WolfcreekCJ is offline  
post #7 of 10 Old 10-08-2013, 07:55 PM
John Strenk
Moderator
 
John Strenk's Avatar
1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 14,932
The ballast resistor getting really hot when the ignition is ON but the engine is not running is "normal" .


What you don't realize is that the ignition module is also overheating.. This is what kills the ignition module.

The alternator needs some way of grounding either through a dedicated ground or through several layers of rust and paint.
John Strenk is offline  
post #8 of 10 Old 10-09-2013, 05:41 AM Thread Starter
WolfcreekCJ
Registered User
1977 CJ7 
 
Join Date: Apr 2011
Location: Wolfcreek
Posts: 147
Thank you Mr. Strenk. Someday this kind of stuff may be "old hat" for me but for now its a bit dicey. Amazing how a mismatched collection of old parts gets under my skin.

All it takes is time and money
WolfcreekCJ is offline  
post #9 of 10 Old 02-12-2016, 04:44 PM
wally6151
Registered User
 
Join Date: Feb 2016
Posts: 5
Motocraft alternator wire

Your diagram does not say if you are using a Motorcraft alternator or not. if you are using a 70's Motorcraft alternator, the odd extra wire with the female blade connector was use for the choke thermal motor on the carburetor to open the choke up only when the engine is running, and provided 12 volts ac power to a indicator light to show the remote engine is operating properly.
wally6151 is offline  
post #10 of 10 Old 02-13-2016, 06:32 AM
Matt1981CJ7
Web Wheeler
 
Matt1981CJ7's Avatar
1981 CJ7 
 
Join Date: May 2011
Location: Elbert
Posts: 16,348
You are about 2-1/2 years to late to this party, Wally.

Matt
Matt1981CJ7 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome