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  1. #1

    Polaris slth no power to MFD

    I have a 1998 polaris slth that I just purchsed. There is no diplay on the mfd, so I check power at the mfd plugin, nothing. I then checked power inside the box at the fuse terminal, nothing there either. I used a meter and touched the black lead to the battery ground and the red lead to either side of the fuse. Battery is brand new, and there is spark when turned over. This is my first polaris so I would appreciate any help.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the Hulk

    If you have spark, then that means the battery voltage is reasonable, and there is power in the electrical box.

    The Red/Purples wires carry the battery voltage inside the electrical box, from the Reset circuit breaker to the terminal board.

    For the MFD display, one end of the small 1/4 Amp fuse should be directly connected to the Red/Purple terminals. The fuse then carries the voltage to the MFD through a separate Red/Purple wire directly to the MFD. If you need to replace the MFD fuse, only use another 1/4 Amp fuse.

    There may be another fuse, which is the 3 Amp fuse for the bilge pump. That fuse only powers the bilge pump, through an Orange wire.

    Sometimes moisture gets inside the electrical box, and corrodes the terminal board. Remove the board, and check it front and back for corrosion or rust. If there is any corrosion, replace the terminal board.

    When re-installing the board, make sure you re-connect all the Black ground wires and ground screws.

  3. #3
    Thanks for the reply. I have power to the 3 amp fuse terminal and the pump works fine.

    I checked and I do have power to one side of the 1/4 amp fuse but not to the other. I assume this means a bad fuse? The fuse looks fine, like it has not blown.

    Is there an electical component that could be bad that would cause there to be no power to the 1/4 amp fuse?

    I checked the front and back of the board and it looks great.

  4. #4
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    Quote Originally Posted by rounder9 View Post
    ...I have power to the 3 amp fuse terminal and the pump works fine.

    Is there an electrical component that could be bad that would cause there to be no power to the 1/4 amp fuse?

    I checked the front and back of the board and it looks great.
    Check the terminal board with an ohm-meter (with battery disconnected).

    You should have a direct zero ohm connection between one end of the 1/4 Amp fuse holder and the Red/Purple terminals (all of them). That is how power gets to the 1/4 Amp MFD fuse.

    Also check the fuse itself. A fuse can look good, yet not have a connection between the two metal ends. Should measure zero ohms between the two ends of the fuse.

  5. #5
    I checked the fuse for ohms and no reading so fuse is bad.
    Any idea where to get this fuse, radio shack says they do not sell it!!
    Thanks

  6. #6
    Click avatar for tech links/info, donation request K447's Avatar
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    1/4 Amp MFD fuse is Radio Shack Catalog #: 270-1002

    Quote Originally Posted by rounder9 View Post
    I checked the fuse for ohms and no reading so fuse is bad.

    Any idea where to get this fuse, Radio Shack says they do not sell it!!
    Thanks
    1/4 Amp MFD fuse is Radio Shack Catalog #: 270-1002

    MFD fuse AGC/3AG type 1/4 Amp, such as Radio Shack Catalog #: 270-1002
    0.25A 250V Fast-Acting 1¼x¼" Glass Fuse (4-Pack)


    Bilge fuse is a 7/8" long 1/4" diameter AGW type fuse, 3 Amps, 32 volt rating

  7. #7
    It turned out to just be a bad fuse. Thanks for all the great help.

  8. #8

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    bilge fuse ??

    hello there , i am having trouble finding the bilge fuse agw type 3 amp 32 volt 7/8" x 1/4" went to radio shack today they ordered the 270-1002 1/4 amp for the mfd but said they coudnt find the 3 amp ??? anyideas
    anyone have a part # for this fuse ? thanks

  9. #9
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by dave the wave View Post
    ...couldn't find the 3 amp ?...
    Do you have the old bilge fuse?

    Exactly how long is it?

    1/4 inch diameter - correct?

    As far as I know, the bilge fuse is 7/8 inch long, Littlefuse type AGW (or SFE), 3 Amp rating, with 1/4 inch diameter metal ends.

    Also made by Bussman

  10. #10

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    yes i have the old fuse , its 7/8 x 1/4 3 amp 32 volt agw type
    however i cant find anyone that sells them thanks david

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