Results 1 to 4 of 4

Thread: 1983 Chev G30 motor home 2012 LSI with dead alternator.

  1. #1
    Carb and Points!
    Join Date
    Dec 2019
    Age
    79
    Posts
    8

    1983 Chev G30 motor home 2012 LSI with dead alternator.

    Engine swap is getting closer to a test drive. Still have issues though. NO output from the alternator! ..I think the problem is because the BCM was not part of the swap. So, does any one have a solution. In reading through GM Docs it appears the BCM talks to the ECM via the GMLAN this communication is integral and sets in motion how the ECM will control to the alternator.

    Anybody have any suggestions?

    Russ C

  2. #2
    Fuel Injected!
    Join Date
    Nov 2019
    Location
    Bossier City, Louisiana
    Age
    65
    Posts
    339
    I don't like to drag traffic away from this site but there are many discussions about this over at LS1Tech.com. A lot will depend on exactly which alternator you are running. The bottom line is that you are likely in for some battery and PCM rewire effort to the "L" and "S" terminals on your alternator for proper excitation and load sensing.

    https://ls1tech.com/forums/conversio...g-again-2.html

    Rick

  3. #3
    Fuel Injected!
    Join Date
    Jun 2014
    Posts
    229
    ....
    Last edited by LRT; 05-24-2021 at 11:28 PM.

  4. #4
    Carb and Points!
    Join Date
    Dec 2019
    Age
    79
    Posts
    8
    Quote Originally Posted by B52Bombardier1 View Post
    I don't like to drag traffic away from this site but there are many discussions about this over at LS1Tech.com. A lot will depend on exactly which alternator you are running. The bottom line is that you are likely in for some battery and PCM rewire effort to the "L" and "S" terminals on your alternator for proper excitation and load sensing.

    https://ls1tech.com/forums/conversio...g-again-2.html

    Rick
    That was exactly the problem ie load sensing. Motor home electrical systems back in 1983 were wired to accommodate non computer controlled electrical systems and their associated alternator regulator systems. These systems utilized a diode commutating scheme to charge auxiliary batteries. AS a result the alternator would never see the battery voltage and would not come on line. A little engineering foolery took care of that problem.

    Thanks all for your suggestions...
    Last edited by Russ C; 01-06-2020 at 04:55 AM.

Similar Threads

  1. Replies: 6
    Last Post: 12-18-2019, 08:13 AM
  2. 1983 5.0 carb ECM 1225450
    By Playtoy_18 in forum GM EFI Systems
    Replies: 9
    Last Post: 10-31-2015, 03:37 AM
  3. WOT bog from dead stop
    By shimniok in forum GM EFI Systems
    Replies: 8
    Last Post: 05-09-2013, 02:35 AM
  4. v10 motor home
    By ony in forum Ford EFI Systems
    Replies: 8
    Last Post: 01-20-2013, 07:57 AM
  5. The Walking Dead...
    By Six_Shooter in forum Gear Heads
    Replies: 4
    Last Post: 10-17-2012, 02:04 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •