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Thread: Nelson Performance 3- relay fan harness

  1. #1
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,117

    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
    8,203
    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
    11,117
    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
    1,184
    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
    3,520
    Looks killer! Need a new project now!

  8. #8
    Join Date
    Nov 2007
    Location
    S.A. Texas
    Posts
    3,819
    Are you caring any relays in house that I could use with my new Fuel pump. I need a 30amp or better for it.
    Name: Mark,
    God created turbo lag so nitrous trucks could have a chance.


    http://www.ls1truck.com/forums/my-ga...tml#post274877

  9. #9
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,117
    thanks guys, let us know if you need anything that is custom.
    extra lengths, different config, etc.
    we may not necessary implement it, that will be based on demand, however, one offs once in a while are fine with us, we don't mind.


    Quote Originally Posted by SLO TRUCK View Post
    Are you caring any relays in house that I could use with my new Fuel pump. I need a 30amp or better for it.
    we usually have every part related to wiring that you'll need.
    like this:
    http://www.nelsonperformance.com/fan...%28Copy%29.jpg

    we could possibly allow this to be mounted on the frame near the pump, supply a 10g txl wire from the relay to the alternator, with fuse, relay would ground off the frame, trigger relay with stock wiring or however you choose.
    but yes, we can.

  10. #10
    Lookin' good, skirted relays are cool.

    The Fleet...
    2003 Suburban- 5.4 L59 331CI 10:5.1 Compression -Built by ME
    2004 Avalanche- 5.7 LS1 -NOT built by me
    2005 Silverado RCSB- 5.7 LS6 -Built by ME

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