Newer alternator install - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-18-2017, 06:27 PM
Registered User
 
Last photo:
Join Date: Sep 2016
Posts: 62
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Newer alternator install

So I'm getting everything together to put a 350 in my 85 Monte Carlo. I'd like to run a serpentine setup but don't know what would be involved with wiring the alternator. I got all the accessories with the l98 I bought but it's a box of parts so I might be missing some brackets and I would definitely need to get a tensioner. I might be able to get a good price for a vortec setup which would be complete. I have done some wiring and would be confident that I could get it done. I just don't know which wires would go where and not sure how to find wiring diagrams or how available a harness would be if I use what I already have. Any advice would be greatly appreciated.


Sent from my iPhone using Tapatalk

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-19-2017, 03:40 AM
EOD Guy's Avatar
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Alabama
Posts: 2,878
Wiki Edits: 0

Thanks: 3
Thanked 287 Times in 268 Posts
GM alts are very straight fwd.

On the alt there are basically 3 connections. Newer alts have a plug that looks intimidating, but still has 2-3 wires, depending on how you want it hooked up.

The Alt pig tail has terminals 1 and 2

Terminal #1 from the alt goes to the one side of the idiot light on the dash. The other side of the idiot light goes to a switched 12v source (hot when the key is in the run position) This is the exciter wire and tells the alt to start producing juice. The idiot light does not get a ground wire, it gets a ground from the internal regulator in the alt when the alt isn't spinning. That's why it lights when the key is turned to run but the engine isn't running, and it goes out when the engine starts. You do not have to have an idiot light or a resistor, you can have just a switched 12V running to the #1 terminal and itíll work just fine.

Terminal #2 from the alt goes to the hot side of the wiring system, normally itís spliced into the hot feed leading to the fuse box. This is the sense wire, it tells the alt to produce more or less juice depending on the demands of your electrical system.
Attached Thumbnails
Click image for larger version

Name:	70 amp CB wiring diagram.jpg
Views:	24
Size:	31.7 KB
ID:	358513   Click image for larger version

Name:	normal_GM_10SI-1.jpg
Views:	21
Size:	23.2 KB
ID:	358521   Click image for larger version

Name:	normal_GM_10SI-2.jpg
Views:	17
Size:	25.3 KB
ID:	358529   Click image for larger version

Name:	normal_GM_10SI-3.jpg
Views:	19
Size:	26.4 KB
ID:	358537   Click image for larger version

Name:	normal_GM_CS130_PLFS-1.jpg
Views:	21
Size:	25.0 KB
ID:	358545  

Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-19-2017, 03:42 AM
EOD Guy's Avatar
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Alabama
Posts: 2,878
Wiki Edits: 0

Thanks: 3
Thanked 287 Times in 268 Posts
More GM Alt
Attached Thumbnails
Click image for larger version

Name:	normal_GM_CS130_PLFS-2.jpg
Views:	69
Size:	27.1 KB
ID:	358553   Click image for larger version

Name:	normal_GM_CS130_PLFS-3.jpg
Views:	35
Size:	28.2 KB
ID:	358561   Click image for larger version

Name:	normal_GM_CS130_PLIS-2.jpg
Views:	29
Size:	27.1 KB
ID:	358569   Click image for larger version

Name:	normal_GM_CS130_PLIS-3.jpg
Views:	36
Size:	28.2 KB
ID:	358577  
Reply With Quote Quick reply to this message
 
  #4 (permalink)  
Old 05-19-2017, 07:26 PM
Registered User
 
Last photo:
Join Date: Sep 2016
Posts: 62
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Newer alternator install

Good info thanks. I saw that powermaster makes adaptors and that's what the alternator I have is so I'll probably give them a call.


Sent from my iPhone using Tapatalk
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-20-2017, 06:25 AM
EOD Guy's Avatar
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Alabama
Posts: 2,878
Wiki Edits: 0

Thanks: 3
Thanked 287 Times in 268 Posts
They sell the pig tail for approx. $15.00 That's what I use and just wire it in.

To test which wire is which on the old pig tail........ #1 wire will be dead with the key off and 12v with the "key on". #2 wire will be hot with the "key on" and "key off"
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-20-2017, 08:41 AM
Registered User
 
Last photo:
Join Date: Sep 2016
Posts: 62
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
That's pretty much what I was trying to find out. The adaptors are what came up when I was looking for a pigtail. What would I do if there's an extra wire on the pigtail?


Sent from my iPhone using Tapatalk
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-20-2017, 03:55 PM
EOD Guy's Avatar
Registered User
 
Last photo:
Join Date: Aug 2010
Location: Alabama
Posts: 2,878
Wiki Edits: 0

Thanks: 3
Thanked 287 Times in 268 Posts
Depend on if you want or need the extra wire's function. if not I snip it off about 1/4 from the connector put a piece of shrink wrap in it, whiles it still hot, I twist the end to seal it. Then I bend the twisted end against the wire and slide on another piece of shrink wrap to lock it into place.

I put a GM alt on my jeep and only used two of the wires on the three wire pig tail.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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 email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

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

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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
how do i install 69 camaro one wire alternator boyd1stgencamaro Electrical 1 11-20-2009 12:31 PM
Hi output alternator install RoyLeoGracie Electrical 1 06-15-2009 08:32 PM
Newer Camaro skadey General Rodding Tech 4 05-07-2004 07:42 PM
newer driveshaft for my s-10 catscan4free Transmission - Rearend 0 01-10-2004 02:51 PM
newer v6 in a corvair jimbo Engine 4 03-02-2003 03:35 AM


All times are GMT -6. The time now is 06:34 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.