1. Battery hooked up backwards

    1997 jeep grand Cherokee Laredo 4wd 4.0 I6. Tried to swap the battery and put it in backwards, then put the original battery back in the right way and it started sparking and smoking. Does anyone know just how much damage I did?

  2. #2
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,186

    Battery hooked up backwards

    Well what is done is done. Its tough to tell. Here are some things to pay attention to:

    Alternator/PCM - there are diodes for the alternator in the PCM.

    The PCM - there are diodes and capacitors that are directional.

    Radio-same as above.

    If you tried starting or just turning the key to on may damage the starter and fuel pump.


    FYI - The battery posts are two different sizes to keep this from happening.





    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  3. #3

    Re: Battery hooked up backwards

    The computer was already bad when I did this, not sure if that makes a difference.

  4. #4
    Join Date
    Feb 2009
    Location
    Dayton Ohio Area
    Posts
    6,186

    Battery hooked up backwards

    I doubt it made it better.


    No the other stuff i mention is still suspect.

    Never look down on anyone unless you are helping them up - Jesse Jackson
    "Never look down on anybody unless you're helping him up" - Jesse Jackson

  5. #5
    Join Date
    Dec 2010
    Location
    California
    Posts
    506

    Re: Battery hooked up backwards

    I'd suggest towing the Jeep to a good autoelectric shop and have them assess the damage. Their diagnosis fees will be money well spent.

  6. #6
    Join Date
    Dec 1999
    Location
    Virginia Beach VA
    Posts
    8,151

    Re: Battery hooked up backwards

    Quote Originally Posted by Jeepergeo View Post
    I'd suggest towing the Jeep to a good autoelectric shop and have them assess the damage. Their diagnosis fees will be money well spent.
    I like doing stuff myself, but this isn't bad advice. Maybe just let them diagnose the issues, and you fix them yourself.
    My 2005 Wrangler Build Thread

    He who is without oil shall throw the first rod. -Compressions 8.7:1

  7. #7

    Re: Battery hooked up backwards

    so what was the outcome?
    99 xj with 350k miles on it. Still runs great

Similar Threads

  1. Hooked!
    By djw00 in forum New Member Introductions
    Replies: 3
    Last Post: 11-09-2009, 12:19 PM
  2. gas guage backwards
    By altheboatman in forum Cherokee, Commander, Wagoneer and Liberty
    Replies: 2
    Last Post: 11-26-2008, 03:32 PM
  3. This is where I got hooked...
    By NiteDog in forum General Chat
    Replies: 2
    Last Post: 03-10-2005, 09:35 PM
  4. I hooked someone
    By Joopin in forum General Chat
    Replies: 18
    Last Post: 11-24-2004, 12:30 PM
  5. Is this driveshaft backwards?
    By Bounty__Hunter in forum Wrangler and CJ
    Replies: 3
    Last Post: 07-20-2003, 08:00 PM

Tags for this Thread

Posting Permissions

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

Log in

Log in