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Low voltage output from Regulator Rectifier unit

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  • #1

    [Photo Feature]: Low voltage output from Regulator Rectifier unit

    My CT100's RR unit is giving only 5 to 8 volt output. It doesn't increase beyond 8v on increasing RPM. Therefore, the battery is not charging and the horn is not working. I changed the RR unit to a new one but I am still getting same values. Stator coil AC output is 10 to 60 volt.

    What could be the problem? Please help!
    Last edited by xBhp; 08-09-2019, 11:42 AM.
    Tags: None
  • #2
    Re: Low voltage output from Regulator Rectifier unit

    Thread approved.

    Comment

    • #3
      Re: Low voltage output from Regulator Rectifier unit

      Anyone willing to help me with his knowledge?

      Comment

      • #4
        Re: Low voltage output from Regulator Rectifier unit

        Originally posted by SkpMech View Post
        Anyone willing to help me with his knowledge?
        I will test and let you know.

        My charging system is good.

        I will tell you the values I get.

        Did you test the new RR in diode mode?

        I was working on my Jawa, the replacement RR was bad too.

        Comment

        • #5
          Re: Low voltage output from Regulator Rectifier unit

          Originally posted by rk1685 View Post
          I will test and let you know.

          My charging system is good.

          I will tell you the values I get.

          Did you test the new RR in diode mode?

          I was working on my Jawa, the replacement RR was bad too.
          I have tested RR in both diaode and resistance mode. In diaode test Yellow and Yellow-Red wire gives 0 value while others doesn't give any values.

          In resistance test. Every wire combination gives resistance in mega ohms (0.7 to 1 mega ohm) except Yellow and Yellow-Red wire which gives zero resistance.

          I don't know what values should a healthy RR unit should give.

          I have attached the image of RR unit.

          Comment

          • #6
            Re: Low voltage output from Regulator Rectifier unit

            Originally posted by SkpMech View Post
            My CT100's RR unit is giving only 5 to 8 volt output. It doesn't increase beyond 8v on increasing RPM. Therefore, the battery is not charging and the horn is not working. I changed the RR unit to a new one but I am still getting same values. Stator coil AC output is 10 to 60 volt.

            What could be the problem? Please help!
            For my bike, AC output is between 26 - 59 Volts.
            Check attached snapshots.

            For RR unit:
            Red lead connected to white wire
            Black lead to yellow wire.

            Unchanged values for diode function.

            Battery voltage:
            At rest and key in off position: 12.4V (Battery age - nearly 2 years old I guess)
            At rest and key in on position: 12.3V
            At Idling: 12.5V
            At approx. 4-5K rpm: 13.7V

            Yellow-Red wire connectors were stuck and I didn't have time enough to disconnect, had to change my accelerator cable and clean the carb.Click image for larger version Name: IMG_20190812_180516.jpg Views: 1 Size: 21.8 KB ID: 1968197Click image for larger version Name: IMG_20190812_180508.jpg Views: 1 Size: 21.6 KB ID: 1968198Click image for larger version Name: IMG_20190812_180555.jpg Views: 1 Size: 22.0 KB ID: 1968199Click image for larger version Name: IMG_20190812_175947_01.jpg Views: 1 Size: 19.2 KB ID: 1968200

            Comment

            • #7
              Re: Low voltage output from Regulator Rectifier unit

              Originally posted by rk1685 View Post
              For my bike, AC output is between 26 - 59 Volts.
              Check attached snapshots.

              For RR unit:
              Red lead connected to white wire
              Black lead to yellow wire.

              Unchanged values for diode function.

              Battery voltage:
              At rest and key in off position: 12.4V (Battery age - nearly 2 years old I guess)
              At rest and key in on position: 12.3V
              At Idling: 12.5V
              At approx. 4-5K rpm: 13.7V

              Yellow-Red wire connectors were stuck and I didn't have time enough to disconnect, had to change my accelerator cable and clean the carb.[ATTACH]250900[/ATTACH][ATTACH]250901[/ATTACH][ATTACH]250902[/ATTACH][ATTACH]250903[/ATTACH]
              I didn't understand this line - "Unchanged values for diode function".
              What values you are getting in diode test?

              I am not getting any reading between white and yellow wire in diode test. It just showing 1 (means infinity).

              Comment

              • #8
                Re: Low voltage output from Regulator Rectifier unit

                Originally posted by SkpMech View Post
                My CT100's RR unit is giving only 5 to 8 volt output. It doesn't increase beyond 8v on increasing RPM. Therefore, the battery is not charging and the horn is not working. I changed the RR unit to a new one but I am still getting same values. Stator coil AC output is 10 to 60 volt.

                What could be the problem? Please help!
                Replace ACG.

                ----consecutive posts auto-merged-----

                Originally posted by SkpMech View Post
                My CT100's RR unit is giving only 5 to 8 volt output. It doesn't increase beyond 8v on increasing RPM. Therefore, the battery is not charging and the horn is not working. I changed the RR unit to a new one but I am still getting same values. Stator coil AC output is 10 to 60 volt.

                What could be the problem? Please help!
                If your battery is ok.
                Replace ACG

                Comment

                • #9
                  Re: Low voltage output from Regulator Rectifier unit

                  Originally posted by curse View Post
                  Replace ACG.

                  ----consecutive posts auto-merged-----


                  If your battery is ok.
                  Replace ACG
                  Yes that is the last option I will do. My battery is discharging when connected to motorcycle. Because charging voltage is only 8 to 10 volts.

                  Comment

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