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Thread: Nelson Performance 3- relay fan harness

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  1. #1
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038

    Nelson Performance 3- relay fan harness

    We have been meaning to post up our new dual electric fan harness.


    Our new fan harness functions just like the previous harness, however, we have improved the components.
    Key features that have been added or retained:
    TXL wiring. Resists high heat!
    OEM Crimped and soldered terminals.
    New Delphi Connectors.
    Heat resistant loom/covering.
    40amp rated waterproof/sealed relays.
    Locking relay connector/socket.
    Easy installation
    Detailed instructions.

    Operation:
    The harness is capable of operating just like the factory harness.
    The PCM is capable of triggering the fan relays based on engine coolant temperature and AC line pressure.


    Concern (reason why improvement was needed): A few vehicles that were equipped with our harness showed signs of terminal contamination. This was caused by the humid climate or washing the engine bay or other variables.
    As terminals become contaminated, they build up heat and cause more resistance due to arc build up. Eventually the relays became nonoperational.

    Fix: We now use only OEM type waterproof/sealed relays. These relays keep any moisture and contaminants off the terminals.

    New sealed relays. Notice the red seal is tight around the wire.



    Hi amp relay:



    In stock.


  2. #2
    Join Date
    Jan 2008
    Posts
    8,031
    Harness I'm running on the daily...easy installation

  3. #3
    Join Date
    Apr 2012
    Location
    LaVista Ne.
    Posts
    19
    Do you recommend replacing the old units?

  4. #4
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    I wouldn't if ur not having any issues with it. The new one will function the same.
    We only changed to sealed relays due to some customers living in high humidity areas and for those who wash their engine bay often.
    A little dielectric grease on the terminals will go a long ways.

  5. #5
    Join Date
    Oct 2011
    Location
    San Antonio TX
    Posts
    1,150
    Cool may need some for a project we got going on.


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

  6. #6
    Join Date
    Apr 2012
    Location
    LaVista Ne.
    Posts
    19
    Ok. Will do. Thanks for the heads up. By the way the updated tune you gave me a month is working fantastic. Once I fixed all the little things from the upgrade (self inflected wounds)... Thanks Allen Tell Erica Thank You also. She is great.

  7. #7
    Join Date
    Aug 2008
    Location
    mansfield texas
    Posts
    3,512
    Looks killer! Need a new project now!

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