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  1. #1

    i got fuel gauge from xlint, i wonder how to install this on my slx 780

    i got a black-ground, pink-to pink in electrical board, pink/white-??? i don't know where to attach?? please help


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by andy95'slx780 View Post
    i got a black-ground, pink-to pink in electrical board, pink/white-??? i don't know where to attach?? please help
    I presume that is an analog Polaris fuel gauge - correct?

    What part number is it?
    3280144 GAUGE ASM, FUEL (Item 10, includes 7-10)
    3280144 was stock only on the 1993 SL750.



    3280169 GAUGE,FUEL
    4060110 SWITCH-RECTIFIER, LR-52 (Available new for about $60US)
    1994-1995 SL650 and 1996-1997 SL700, SLT700

    My understanding is the analog fuel gauges requires a special low voltage feed (2.5 volts, if memory serves). This would normally supplied by an LR-52 module. LR-52 is the only Polaris LR module with the Red/White low voltage output.

    For 1993 I think the LR-52 was part# 4060101 SWITCH-RECTIFIER
    1994-1997 the LR-52 part# was 4060110
    I don't know what, if any, differences there are between the two LR-52 versions or the two analog fuel gauge versions.

    The wire connections would be;
    Black = Ground
    Pink = Fuel sender
    Red/White = LR-52 low voltage power feed

    If I am correct, you will need to install the matching LR-52 module to use the analog fuel gauge.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Polaris Voltage Regulator info (LR21, LR23, LR50, LR52. LR54).jpg 
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  3. #3
    hmmm... so i need to buy first LR52, so my electrical box will have 3 LRs inside

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by andy95'slx780 View Post
    hmmm... so i need to buy first LR52, so my electrical box will have 3 LRs inside
    What two LR modules do you have now?

  5. #5
    LR 54 and LR23

  6. #6
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    Quote Originally Posted by andy95'slx780 View Post
    ...so i need to buy first LR52, so my electrical box will have 3 LRs inside
    Quote Originally Posted by andy95'slx780 View Post
    LR 54 and LR23
    I think you are correct. Three LR modules, if you want to retain the RPM limiting feature of the LR-54 module.

    The LR-52 can NOT replace the LR-21, since the LR-52 does not have voltage regulation.

    LR-21 does Orange wire switching and battery voltage regulation

    LR-52 does Orange wire switching and Red/White fuel gauge output

    Note: If you do install all three LR modules, leave the Orange output of the LR-52 disconnected and taped. Do not connect the two Orange LR outputs together.

  7. #7
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Pretty sure that's a red/white wire, not pink/white.

    Should be fine to route the pink wire that goes to the MFD, directly to the analog gauge.

    I added a MFD to a 94 SL 650 without ever changing any modules. Never had an issue.

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by xlint89 View Post
    Pretty sure that's a red/white wire, not pink/white.

    Should be fine to route the pink wire that goes to the MFD, directly to the analog gauge.

    I added a MFD to a 94 SL 650 without ever changing any modules....
    The MFD doesn't connect to the Red/White wire, since the MFD is powered by 12 volts (Red/Purple).

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