Results 1 to 6 of 6

Thread: Electrical issue

  1. #1
    Join Date
    Dec 2018
    Location
    Western NY
    Posts
    6
    My Cars
    1998 BMW 740iL

    Electrical issue

    Hi, thanks for joining the fun. I have a 98 740iL and am completely stuck. I have an issue with the electrical system. I have tried 2 different batteries and 2 different alternators. None of the combinations have solved the issue that the alternator does not charge the battery. The only next logical step that I can think of would be to trace from alternator to battery. Anyone know if any fuses could be a problem?

  2. #2
    Join Date
    Jan 2017
    Location
    North Carolina coast
    Posts
    435
    My Cars
    2001 740iL Prod 4/2000
    Check TIS link: https://www.newtis.info/tisv2/a/en/e...ontrol/buh9GbM

    There are no fuses between the alternator and battery. There is Fuse 22 which is the voltage reference lead. If that fuse is out the regulator
    will not activate. The reference voltage then goes to the DME, turning off the 'battery' light once charging.

  3. #3
    Join Date
    Dec 2018
    Location
    Western NY
    Posts
    6
    My Cars
    1998 BMW 740iL
    Awesome, will go check thank you.

  4. #4
    Join Date
    Dec 2018
    Location
    Western NY
    Posts
    6
    My Cars
    1998 BMW 740iL
    Quote Originally Posted by oldroller View Post
    There are no fuses between the alternator and battery. There is Fuse 22 which is the voltage reference lead. If that fuse is out the regulator
    will not activate. The reference voltage then goes to the DME, turning off the 'battery' light once charging.
    Fuse 22 was intact. Does that mean I need to pull out my multimeter?

  5. #5
    Join Date
    Apr 2009
    Location
    Land O Lakes, FL
    Posts
    1,077
    My Cars
    1986 535i, 2012 X5 50i
    Check the fuse with the multi-meter for continuity, don't rely on a visual check alone (sometimes they look ok but they are not).
    Jimmy Moreno
    BMW CCA 115551
    1986 535i, Arctic Blue
    2012 X5 XDrive 501, Sparkling Bronze Metallic

  6. #6
    Join Date
    Dec 2018
    Location
    Western NY
    Posts
    6
    My Cars
    1998 BMW 740iL
    Will do, on way out to work some more, thanks.

Similar Threads

  1. Electrical issues with car help!!!!
    By nicom3 in forum 1992 - 1999 M3 (E36)
    Replies: 0
    Last Post: 04-09-2004, 09:13 AM
  2. Electrical Issues after Ellipsoid Install
    By toddman35 in forum 1991 - 1999 (E36)
    Replies: 24
    Last Post: 12-24-2003, 12:55 PM
  3. Electrical issue...
    By LTrain in forum 1992 - 1999 M3 (E36)
    Replies: 0
    Last Post: 11-28-2003, 11:36 PM
  4. Help with tiny electrical issue
    By Dan in forum 1991 - 1999 (E36)
    Replies: 2
    Last Post: 02-17-2003, 07:25 PM
  5. Electrical Issues
    By Harry in forum 1991 - 1999 (E36)
    Replies: 2
    Last Post: 06-28-2001, 05:08 PM

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
  •