Need Help Wiring Mosfet Voltage Regulator

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by BoznBlack, Jan 12, 2014.

  1. BoznBlack

    BoznBlack Go Big

    Joined:
    Dec 30, 2006
    Oddometer:
    64
    I decided to upgrade my voltage regulator to the Shindengen FH020AA mosfet design and ran into a snag. I wired the output of the regulator directly to the battery terminals using the supplied heavy gauge wiring and fuse. Now there is no power to the ignition. I am assuming now that I should have wired it to the white connector near the starter relay. I have seen some other posts that did it this way. The stock regulator had two green wires and two red/white striped wires coming out, in addition to the three stator leads. Am I to assume that both red/white leads from the stock regulator are positive, and I should be splitting the positive output from the mosfet regulator to supply the white relay connector? I really like the heavy duty direct hookup to the battery, but it appears I am stuck. Any help unraveling this would be great. I Was a bit confused on the wiring approach used in this thread:

    http://advrider.com/forums/showthread.php?t=820432&highlight=mosfet+regulator+install

    Bike is a 2006 950 Adventure.
    #1
  2. AdvRonski

    AdvRonski They call me......Ronski

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    I think some pictures of what you've done so far would be helpful. Even if you disconnect the original regulator, you would still have battery voltage to the ignition switch.
    #2
  3. gefr

    gefr Life is a trip

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    Something is not connected. Maybe the starter relay?
    #3
  4. BoznBlack

    BoznBlack Go Big

    Joined:
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    Thanks Gefr. I did mess with the starter relay, and I may have hooked up the heavy gauge power leads reversed. Can you confirm which terminal (inner or outer) goes to the positive battery terminal? Thanks much
    #4
  5. Peanuts

    Peanuts Long timer

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    Swap the wires around. No harm will be done.
    #5
  6. BoznBlack

    BoznBlack Go Big

    Joined:
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    That was it, I had reversed the power leads on the starter relay. Fired up great once I had switched them to the proper terminals. Got a solid 14.4v. What a bonehead move. Thanks for the tips.
    #6
  7. Dustodust

    Dustodust Long timer

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    Hillsboro Oregon
    Glad you got it sorted
    Great upgrade !
    my system was getting weak and intermittent before it failed at the end of a long ride, I barely made it into the driveway holding a flashlight out over the bars with the motor sputtering and popping
    was barely getting 12 volts out of it
    now it is a steady 14.4 all the time
    now I have enough power to run a heated jacket and heated grips and HID lights wont black out

    [​IMG][/url]
    DSC01263 by dustrider@verizon.net, on Flickr[/IMG]
    #7
  8. HellsAlien

    HellsAlien a has-been that never-was

    Joined:
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    Location:
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    Dust and all,
    Was your failure mode a drop in voltage?

    I got caught out in the woods yesterday, 950A would not start. I had run up a long slow hill (10 miles) with e-vest on and high beam on. We got it bump started and back to town. After the run back to town, I get 12.8/12.9V on the good Fluke meter at 5K RPM. Battery is almost 5 y.o. too, a good AGM batt. But batt seems OK, may be aging, but cranks fine when pulled from the trickle charger.

    I think its regulator, but not sure if they typically fail to low voltage or high. I will check the connectors for dirt/corrosion, seems to me I went through this a couple years ago and saw the same low voltage and found no dirt/corrosion.

    What model did you mount up? Looks like the SH775 may be the way to go these days for 950A.

    Thanks for your input guys!
    #8