no power to windows, blower motor fan, or sun roof

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  • e-dirtym52
    Grease Monkey
    • Aug 2012
    • 338

    #1

    no power to windows, blower motor fan, or sun roof

    Put a new wiring harness in and come to find out the windows, blower motor, and sunroof quit working. They all worked perfectly fine before and all the fuses are still good. I have 4 wires going to the starter but I haven't had the time yet to go check through wires to see if it's getting power to the cut off switch or the window buttons. Any typical issues with these combination of things going out? I did a little research but didn't really come up with all too much.
    If you're not going to do it right, please don't take it out on your car!
  • surebimmer
    E30 Modder
    • Jan 2004
    • 978

    #2
    Sounds like you tripped the circuit breaker. It's a little black box on your center console or dash area. Looks like the picture below, it should have two green wires going to it.

    Comment

    • Jalves619
      E30 Addict
      • Mar 2010
      • 596

      #3
      99% sure it is the unloader relay. It normally grounds through the starter but opens when the starter is running to lessen the draw on the battery. check your connections at the starter again.

      Comment

      • e-dirtym52
        Grease Monkey
        • Aug 2012
        • 338

        #4
        I've hit the circuit breaker on off many times to see if my windows will kick on. But the circuit breaker won't kill my blower motor fan. I'll try to snap a pic of the starter wires tomorrow and make sure its tight. Which wire would it go through?
        If you're not going to do it right, please don't take it out on your car!

        Comment

        • frankie591
          E30 Addict
          • Feb 2012
          • 545

          #5
          Originally posted by Jalves619
          99% sure it is the unloader relay. It normally grounds through the starter but opens when the starter is running to lessen the draw on the battery. check your connections at the starter again.
          This. Had the same problem myself with a sticky relay

          Comment

          • e-dirtym52
            Grease Monkey
            • Aug 2012
            • 338

            #6
            Which relay was it for you?
            If you're not going to do it right, please don't take it out on your car!

            Comment

            • e-dirtym52
              Grease Monkey
              • Aug 2012
              • 338

              #7
              I have 4 wires running to my starter. 2 thick ones, 1 middle size one, and one small one. Which one does the unloader run through?
              If you're not going to do it right, please don't take it out on your car!

              Comment

              • reelizmpro
                R3V OG
                • Dec 2003
                • 9459

                #8
                The small one on top. Check to see if it's broken. They damage easily when you torque the nut down and the wire / terminal turns with it against the solenoid. Then the vibration of the engine breaks the connection.
                "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

                85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
                88 M3 - LACHSSILBER/SCHWARZE
                89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
                91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

                Comment

                • frankie591
                  E30 Addict
                  • Feb 2012
                  • 545

                  #9
                  Originally posted by e-dirtym52
                  Which relay was it for you?
                  One of the 3 relays by the c101 connector. 1 is the main relay, 1 is 02 sensor heater relay, other is unloader relay

                  Comment

                  • e-dirtym52
                    Grease Monkey
                    • Aug 2012
                    • 338

                    #10
                    I thought the those three were fuel pump, oxy, and main. At least that's what mine are labeled at.
                    Last edited by e-dirtym52; 10-16-2013, 02:05 PM.
                    If you're not going to do it right, please don't take it out on your car!

                    Comment

                    • frankie591
                      E30 Addict
                      • Feb 2012
                      • 545

                      #11
                      Originally posted by e-dirtym52
                      I thought the those three were fuel pump, oxy, and main. At least that's what mine are labeled at.
                      oops my bad. The unloader relays are k5 and k7 in the fuse box

                      Comment

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