What's going on with my car's electrical system?

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  • DORIGTT
    Member
    • Dec 2003
    • 47
    #1

    What's going on with my car's electrical system?

    I've got a 87 325is which recently started to loose charge and be unable to start after sitting for a day or so. I just charged the battery and reinstalled it and my car started right away. Something wierd is going on though. The service inspection lights stay on even after the car is off and the key is removed :evil: What is going on?
    Tags: None
    • Kavkazia
      Grease Monkey
      • Oct 2003
      • 394
      #2
      Have you checked your altenator? It should be throwing close to 14Vs!

      I have 87iS parts car and my does same thing with inspection light, I reset it and still have the service light, so I guess it's normal?
      95' M3.
      90' 325i Turboed.
      87' 325eS Fixed.

        Comment

        • 65Matt
          Advanced Member
          • Oct 2003
          • 172
          #3
          Maybe your ignition switch is malfunctioning. Use an ammeter to see if there is a current draw. Start at the battery and pull fuses one by one. Notice which circuit is drawing the amps.

            Comment

            • DORIGTT
              Member
              • Dec 2003
              • 47
              #4
              Murphy's Law sucks! I'm thinking I'm fine and that I'll wait a few days and work on it later this week....NOT! My wife hits something in her Audi (lowered so I guess it's my fault somehow) and the oil pan won't be in for two days. My NEW truck pops a lower radiator hose...DAMN! No dealer in a 20 mile radius has one....I suck.

              Who's grave did I pee on?

                Comment

                • BavarianBimmer
                  E30 Modder
                  • Oct 2003
                  • 951
                  #5
                  Get another SI board
                  I've got the same troubles
                  SI board from a junkyard installed and my inspection light went out

                  1989 E30 318iS_______________________________1989 E30 325iC M-Technic I
                  1997 E36 328iT
                  1990 E30 325iT 24v SOLD
                  1989 E30 325i 2.7i M-Technic II SOLD

                    Comment

                    • Fuddy
                      Advanced Member
                      • Oct 2003
                      • 123
                      #6
                      check all the small bulbs (check engine, oil light etc.) when you turn the key to the "on" position (without turning on the car) make sure those bulbs are not burned out

                      on my old eta I had the same problem... and that was the cause... one measely little bulb

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                        • DORIGTT
                          Member
                          • Dec 2003
                          • 47
                          #7
                          O.K., some of you have lost me. My S.I. lights stay on...all the time. Key in, key out...the lights stay on. I'm going to check the alternator output tomorrow, but I don't see how that drains the battery overnight. I put a test light between the negative terminal of the battery and the negative lead and it burns bright! I know something is on, it's just a matter of finding out what it is.

                          Wish me luck and throw out any suggestions you have.

                          Thanks in advance.

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