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  • Alternator Output

    Hi can anyone enlighten me, what is the maxium output current of the 120 series alternator (ie amps)

  • #2
    Re: Alternator Output

    The OZ spec D4D is 80Amps.

    Leachy
    EX-Prado Owner

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    • #3
      Re: Alternator Output

      Is it any different for the 120 series petrol? thanks
      [size=1][color=#990000][b]--> Macarthur District 4WD Club Member <--[/b][/color]
      ::2005 Black Grande Petrol V6::2 x PP Stickers::ARB Deluxe Winch Bar::IPF Spotties + Fogs:: Dual Battery, ABR DBi120 Isolator & Volt Monitor::ARB Portable Air:: Rear Drawer Unit::Trek Table::WAECO 40Lt::WAECO Raps R12U::AMTS Rear Tyre Spacer::HILUX Washers::UHF::Prodigy P3::Stebel Air Horns:: Inverter::CouplerTec Electronic Rustproofing::OEM Roof Racks, Towbar, Hard Wheel Cover::REAR CAMERA to factory GPS::[/size]

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      • #4
        Re: Alternator Output

        I know there is heaps on alternator output but today while I had mine at the auto elec to fix up a dealer stuff up [ see sovereign bull bar recall thread] I had him check mine and he said it was fine. He said that they charge very low and suggested that I drive with lights on as an increased in load makes it charge higher to top the battery up quicker on short trips. Any thoughts? Neil

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        • #5
          Re: Alternator Output

          This will in effect cause the charge rate to be higher as the extra load from the lights draws more current. As for charging the battery quicker, i personally haven't heard of that one, to the best of my knowledge it will still only charge at the same rate, in any case the difference would be so small it would not really be worth the effort.

          Batto.
          [url=http://www.pradopoint.com/showthread.php?26874-Batto-s-120-Build]2007 D4D GX[/url]
          [url=http://www.myswag.org/index.php?topic=25018.msg386484#msg386484]2012 Challenge Outback Deluxe[/url]

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          • #6
            Re: Alternator Output

            The alternator is a 120A output according to the user manual. The output can be increased by 0.6V by installing a diode in series with the alternator sense pin. If that's not enough, 2 diodes will give a 1.2V increase.
            2019 GXL, Bullbar, UHF, Redarc Brake Controller, Tow Bar, Secondary Fuel Filter

            Comment


            • #7
              Originally posted by gxl_d4d View Post
              The alternator is a 120A output according to the user manual. The output can be increased by 0.6V by installing a diode in series with the alternator sense pin. If that's not enough, 2 diodes will give a 1.2V increase.
              Where abouts in the manual, I couldn't find it.
              Everything I have read seems to say it is an 80 amp unit.

              Cheers
              Robert
              gumboot
              Avid PP Poster!
              Last edited by gumboot; 17-12-2012, 10:46 AM.
              [B]Robert
              [URL="http://www.pradopoint.com/showthread.php?32134-Gumboot-s-120-D4D-GXL"]2007 D4D GXL Prado[/URL][/B]
              [I]"The true measure of a man is how he treats someone who can do him absolutely no good."[/I]
              [SIGPIC][/SIGPIC]

              Comment


              • #8
                Turning on the headlights only works on a couple of cars on which the alternator
                output is controlled by the engine management system ie the Mazda BT50.

                It will not work on non ECU controlled alternators which most vehicles have and will
                actually decrease the charge rate, which can be proven simply by monitoring the
                battery terminal voltage and turning on the headlight, you will see a drop of about .2V

                You can make or buy a booster diode as described above to overcome the low charging voltage.

                Cheers
                LeighW
                HKB Electronics, manufacturer of the Alternator Voltage Booster, Silver 2008 D4D,Lifted,Underbody protection, Alternator Voltage Booster, Tiger Z winch, Lightforce DL, Air Horns, Tanami Drawers, Drop down fridge slide, Outback cargo barriers, Rotronics dual Battery system, Polaris GPS, HF/UHF/VHF, Radio speaker combiner, Long ranger water tank, Diff breathers, Inverter, Snorkel and others

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                • #9
                  I rang around today it is seems now you can get an aftermarket 130AMP alternator upgrade for the Prado 120's.
                  [B]Robert
                  [URL="http://www.pradopoint.com/showthread.php?32134-Gumboot-s-120-D4D-GXL"]2007 D4D GXL Prado[/URL][/B]
                  [I]"The true measure of a man is how he treats someone who can do him absolutely no good."[/I]
                  [SIGPIC][/SIGPIC]

                  Comment


                  • #10
                    Originally posted by gumboot View Post
                    I rang around today it is seems now you can get an aftermarket 130AMP alternator upgrade for the Prado 120's.
                    Will it still be a low output Alternator? ie. would you still need LieghW's Voltage booster?

                    Comment


                    • #11
                      Originally posted by Hibbo View Post
                      Will it still be a low output Alternator? ie. would you still need LieghW's Voltage booster?
                      Hibbo,
                      They tell me it is a 130AMP Denso replacement unit and they were seeing a touch over 14 volts out of them.
                      My stock 120 D4D is doing around 13.2volts. With LeighW's voltage booster it is pretty constant at about 13.7-13.8 once fully warm.
                      Cheers
                      Robert
                      [B]Robert
                      [URL="http://www.pradopoint.com/showthread.php?32134-Gumboot-s-120-D4D-GXL"]2007 D4D GXL Prado[/URL][/B]
                      [I]"The true measure of a man is how he treats someone who can do him absolutely no good."[/I]
                      [SIGPIC][/SIGPIC]

                      Comment


                      • #12
                        Hey guys.
                        Went to start the beast yhis morning to find it wouldnt crank...
                        The multimeter was reading 10V on the crancking battery.
                        What we did find was the DVD player was turned on... Obviously by the kid.
                        After a jump start the input charge to the battery is 12.9V at idle & 13.4V when revvinf.
                        In my mind the altinator is ok but I was wondering if it actually should be charging at a higher rate?
                        Cheers Drew.
                        HERS - KZJ120, BILSTIEN / KINGS, AMTS GEAR, RHINO GEAR, OUTBACK DRAWERS ETC ETC ETC
                        MINE - HDJ78 RV TROOPY. 1HDFTE. TWIN FACTORY LOCKERS. STEINBAUER POWER. OME LIFT. BEAST.

                        Comment


                        • #13
                          Originally posted by mackayvx View Post
                          Hey guys.
                          Went to start the beast yhis morning to find it wouldnt crank...
                          The multimeter was reading 10V on the crancking battery.
                          What we did find was the DVD player was turned on... Obviously by the kid.
                          After a jump start the input charge to the battery is 12.9V at idle & 13.4V when revvinf.
                          In my mind the altinator is ok but I was wondering if it actually should be charging at a higher rate?
                          Cheers Drew.
                          G'day Drew,
                          If its the same as mine (still a 120 but D4D) that sounds normal they don't output alot of charge. I bought a this little fuse "diode" thing on ebay that replaces the alt fuse this bought the charge rate up to around 14 volts it was 30 bucks for memory.
                          Cheers.
                          2016 1GD GXL 6 speed auto, ARB colour coded summit bar, LED driving lights, duel batteries, BF Goodrich tyres, window tint.

                          Comment


                          • #14
                            Originally posted by azzss View Post
                            G'day Drew,
                            If its the same as mine (still a 120 but D4D) that sounds normal they don't output alot of charge. I bought a this little fuse "diode" thing on ebay that replaces the alt fuse this bought the charge rate up to around 14 volts it was 30 bucks for memory.
                            Cheers.
                            Hey azz.
                            No ive got the kzj with the 1kzte. But wow 14V charge?
                            Thats insane.
                            I think my problem is with the roof mounted DVD player that is wired into the same circuit as the interior lights.
                            Having constant power to it enables the kid to leave it on....
                            I think ill remove it... Seriously who watches DVDs these days anyway?
                            HERS - KZJ120, BILSTIEN / KINGS, AMTS GEAR, RHINO GEAR, OUTBACK DRAWERS ETC ETC ETC
                            MINE - HDJ78 RV TROOPY. 1HDFTE. TWIN FACTORY LOCKERS. STEINBAUER POWER. OME LIFT. BEAST.

                            Comment


                            • #15
                              Originally posted by azzss View Post
                              G'day Drew,
                              If its the same as mine (still a 120 but D4D) that sounds normal they don't output alot of charge. I bought a this little fuse "diode" thing on ebay that replaces the alt fuse this bought the charge rate up to around 14 volts it was 30 bucks for memory.
                              Cheers.
                              Hey azz.
                              No ive got the kzj with the 1kzte. But wow 14V charge?
                              Thats insane.
                              I think my problem is with the roof mounted DVD player that is wired into the same circuit as the interior lights.
                              Having constant power to it enables the kid to leave it on....
                              I think ill remove it... Seriously who watches DVDs these days anyway?
                              HERS - KZJ120, BILSTIEN / KINGS, AMTS GEAR, RHINO GEAR, OUTBACK DRAWERS ETC ETC ETC
                              MINE - HDJ78 RV TROOPY. 1HDFTE. TWIN FACTORY LOCKERS. STEINBAUER POWER. OME LIFT. BEAST.

                              Comment

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