Skip to content
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (Slate)
  • No Skin
Collapse
Brand Logo

DT125R FORUM

  1. Home
  2. Technical Zone
  3. Electrics
  4. lights diming when brake aplied

lights diming when brake aplied

Scheduled Pinned Locked Moved Electrics
26 Posts 4 Posters 5.3k Views
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • britshgigoloB Offline
    britshgigoloB Offline
    britshgigolo
    wrote on last edited by
    #1

    me again have noticed my headlight is dimming to nearly out when riding home tonight when pressing the brake be it front or rear check conections when i got back and all seem clean is this normal as i have not noticed it before was the same on main and dipped or do you thik the battery is at fault

    MightymanM 1 Reply Last reply
    0
    • britshgigoloB britshgigolo

      me again have noticed my headlight is dimming to nearly out when riding home tonight when pressing the brake be it front or rear check conections when i got back and all seem clean is this normal as i have not noticed it before was the same on main and dipped or do you thik the battery is at fault

      MightymanM Offline
      MightymanM Offline
      Mightyman
      wrote on last edited by
      #2

      @britshgigolo Could be a sign the battery is on it's way out I suppose... But the generators on these bikes don't output very much at low revs so a few bulbs going at once is usually enough to dim one or more of them from drawing too much current. My TDR gets to the point that, if the engine is cold, it struggles to idle with my headlights on 😂

      TDR 125 - 2001

      1 Reply Last reply
      0
      • britshgigoloB Offline
        britshgigoloB Offline
        britshgigolo
        wrote on last edited by
        #3

        yer i know they normaly did down when ticking over but this was like the headlight had gone out that was on main beam and it only seems like it the breaks causing it but will test tomorrow with indicators and test the voltage on the battery in the morning before starting out

        MightymanM 1 Reply Last reply
        0
        • britshgigoloB britshgigolo

          yer i know they normaly did down when ticking over but this was like the headlight had gone out that was on main beam and it only seems like it the breaks causing it but will test tomorrow with indicators and test the voltage on the battery in the morning before starting out

          MightymanM Offline
          MightymanM Offline
          Mightyman
          wrote on last edited by
          #4

          @britshgigolo you replaced any bulbs with LEDs?

          TDR 125 - 2001

          1 Reply Last reply
          0
          • britshgigoloB Offline
            britshgigoloB Offline
            britshgigolo
            wrote on last edited by
            #5

            no all standard just uprated the headlight bulb to a 60w as was not very good as it was down the dark lanes

            1 Reply Last reply
            0
            • CalumC Offline
              CalumC Offline
              Calum
              wrote on last edited by Calum
              #6

              When riding, the generator should output sufficient power not to dim lights, at tick over on the R yes can have an effect. Not as powerful as the X and RE.

              If it's happening whilst riding then I will say genny isn't working, check a voltmeter over the batter terminals on idle. Should display 14.2v ish. And what's it with the engine off. Should be 12V. Could also be rectifier. Measure the impedance of the rectifier.

              Always Originate, Never Pirate!

              1 Reply Last reply
              0
              • britshgigoloB Offline
                britshgigoloB Offline
                britshgigolo
                wrote on last edited by
                #7

                ok ty calum not been feeling good today so not had chance to check anything but as soon as i got some figures will let you know

                1 Reply Last reply
                0
                • GoProKid95G Offline
                  GoProKid95G Offline
                  GoProKid95
                  wrote on last edited by
                  #8

                  Best bet is to dig out your multimetre, start the bike and check to see that everything is doing what it is supposed todo. Begin with the battery and just eliminate everything until you've got your answer. The chances are that the bulb you've got installed is so massive its drawing a huge amount of current, hence the dimming of the other light! 🙂

                  GoProKid95

                  2006 DT125RE - SM Conversion

                  1 Reply Last reply
                  1
                  • britshgigoloB Offline
                    britshgigoloB Offline
                    britshgigolo
                    wrote on last edited by
                    #9

                    ty goprokids but its the headlight that is dimming when brakes are aplied and all other bulbs are standard still not been well enough to have a look hoping i will feel beter tomorow but will keep you all up to date how i get on

                    1 Reply Last reply
                    0
                    • britshgigoloB Offline
                      britshgigoloB Offline
                      britshgigolo
                      wrote on last edited by
                      #10

                      Right tested battery this morning after been sitting for two days and got 11.96 and with engine running got 14.58

                      1 Reply Last reply
                      0
                      • CalumC Offline
                        CalumC Offline
                        Calum
                        wrote on last edited by
                        #11

                        So the generator works. Whats the voltage when the brakes applied.

                        Sounds like there is some excessive load on the genny when the brakes are applied. This could be due to some resistive load. Best check the headlamp connections.

                        Always Originate, Never Pirate!

                        1 Reply Last reply
                        0
                        • britshgigoloB Offline
                          britshgigoloB Offline
                          britshgigolo
                          wrote on last edited by
                          #12

                          right had some spare time today and checked all conection and cleaned all conections but still have the same problem but have noticed the higher the revs the worst the problem is so at full brightness high revs the bulb dips more tryed standard bulb back in and it sill doing this not sure what to check now so any help would be good even ran another earth but this still did not help

                          CalumC 1 Reply Last reply
                          0
                          • britshgigoloB britshgigolo

                            right had some spare time today and checked all conection and cleaned all conections but still have the same problem but have noticed the higher the revs the worst the problem is so at full brightness high revs the bulb dips more tryed standard bulb back in and it sill doing this not sure what to check now so any help would be good even ran another earth but this still did not help

                            CalumC Offline
                            CalumC Offline
                            Calum
                            wrote on last edited by
                            #13

                            @britshgigolo Check the rectifier.

                            Always Originate, Never Pirate!

                            1 Reply Last reply
                            2
                            • britshgigoloB Offline
                              britshgigoloB Offline
                              britshgigolo
                              wrote on last edited by
                              #14

                              @Calum ty calum for the quickresponce as always is there a way to test them or is it just get a new one got multi meter

                              CalumC 1 Reply Last reply
                              0
                              • britshgigoloB britshgigolo

                                @Calum ty calum for the quickresponce as always is there a way to test them or is it just get a new one got multi meter

                                CalumC Offline
                                CalumC Offline
                                Calum
                                wrote on last edited by
                                #15

                                @britshgigolo Check the impedance across it.

                                In theory it should just be a bunch of diodes so continuity should give an idea.

                                Always Originate, Never Pirate!

                                1 Reply Last reply
                                0
                                • britshgigoloB Offline
                                  britshgigoloB Offline
                                  britshgigolo
                                  wrote on last edited by
                                  #16

                                  @Calum hi mate been a hectic week so have not had any time to check the rectifier so ordered a new one and new battery as it just quicker to replace them have been offered another stator but not sure what one mine has as when looking up seem to be diffrent types i assume for diffrent years would you know if the 2001 dtr is the one with the 3 pulse coils as thats the type i can get hold of and thinking to get it just incase as i know you can replace the 3 pulse coils separately so thinking good as spares incase it is at fault i would check whats fitted but waiting on the flywheel puller to turn up to as did not have one

                                  1 Reply Last reply
                                  0
                                  • britshgigoloB Offline
                                    britshgigoloB Offline
                                    britshgigolo
                                    wrote on last edited by britshgigolo
                                    #17

                                    Right finally got time to test the stator and I'm getting higher reading then what the Haynes manual says I think I'm testing it right pics to show
                                    So I'm getting 813 from the stator and 274 from the pick up coil so from the Haynes it says pulser coil 280 to 420 and source coil 192 to 288 does this sound right any help would be great pics are to show how testing0_1486221475840_IMG_2222.JPG 0_1486221489437_IMG_2224.JPG 0_1486221496052_IMG_2223.JPG 0_1486221502564_IMG_2226.JPG 0_1486221508926_IMG_2225.JPG

                                    1 Reply Last reply
                                    0
                                    • britshgigoloB Offline
                                      britshgigoloB Offline
                                      britshgigolo
                                      wrote on last edited by
                                      #18

                                      can some one tell me if i have tested this right please have got another stator coming tomorrow as im sure its giving wrong reading acording to the haynes

                                      1 Reply Last reply
                                      0
                                      • britshgigoloB Offline
                                        britshgigoloB Offline
                                        britshgigolo
                                        wrote on last edited by
                                        #19

                                        well looks like i been a dick as did not read the amendments at the back of the haynes for the newer type stator so turns out that mine was ok all along well got a spare now for a rainy day

                                        CalumC 1 Reply Last reply
                                        1
                                        • britshgigoloB britshgigolo

                                          well looks like i been a dick as did not read the amendments at the back of the haynes for the newer type stator so turns out that mine was ok all along well got a spare now for a rainy day

                                          CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #20

                                          @britshgigolo Nice one bud, thanks for updating us. Makes it useful to anyone else having similar problems.

                                          Continuing reporting back to us as you find out more information.

                                          Again I suggest applying the brakes and reading the voltage drop across the battery.

                                          You can get SMD bulbs to go in for the brake and side lights. This may help reduce the load from like 15w bulb to 1w. May help.

                                          I run SMD lights.

                                          Always Originate, Never Pirate!

                                          britshgigoloB 1 Reply Last reply
                                          1
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups