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Thread: Electric Fan Control?

  1. #1
    Join Date
    Jan 2005
    Location
    L.I. NY>
    Posts
    233

    Default Electric Fan Control?

    Waiting for OEM electric auxilliary fan, was wondering if the old 99's ECM controls it or just have the A/C clutch activate the relay? I dont seem to think the ECM sees or monitors A/C high pressure. Probably hook up manual switch for shut off at hwy speed.
    Anyone done this install? open for suggestions.
    Dave
    99 sub 2500, 326,000mi, 4:10, 265-75-16 rubber, remote Dtech fsd and turbo master from Heath Isspro pyrometer and boost gauge-Kennedy, 1.94 TDCO, 3" custom bent exh.
    07 Suburban,08 LMM, Allison 6 speed.

  2. #2
    AKMark is offline Building another 6.2L powered vehicle
    Join Date
    Dec 2006
    Location
    North Pole, Alaska
    Posts
    400

    Default

    Just install a controller to run it.

    http://www.jegs.com/i/JEGS-Performan...oductId=943351
    05 2500HD CC LB LLY, 4x4, 3.73s 235/85R16's, webasto cab heater, to keep it warm.
    03 Buick Rendezvous - When you average over 80 miles per day driving around, you need one of these.
    85 K-5, 6.2, SM465, Rockwell T221, 1 tons, 36's. More goodies to be installed as time and money allows.
    82 K20, 6.2, SM465, NP208, stock except for bed rack, snow plow, and glow plugs are on a toggle switch. It works great for plowing!
    72 Postal Jeep - Yet another project

  3. #3
    Join Date
    Jan 2005
    Location
    L.I. NY>
    Posts
    233

    Default

    Thanks, That seems to be a lot less complicated than what I was dreaming up.
    99 sub 2500, 326,000mi, 4:10, 265-75-16 rubber, remote Dtech fsd and turbo master from Heath Isspro pyrometer and boost gauge-Kennedy, 1.94 TDCO, 3" custom bent exh.
    07 Suburban,08 LMM, Allison 6 speed.

  4. #4
    AKMark is offline Building another 6.2L powered vehicle
    Join Date
    Dec 2006
    Location
    North Pole, Alaska
    Posts
    400

    Default

    The K-5 in my signature has dual electric fans. I wired a hi/lo switch on the dash. Run low almost anytime the engine is running (except during extreme cold) have yet to need hi, although it is there. On low, just one fan runs at low speed, on hi both fans run at high speed.

    The K-5 is a toy, doesn't tow so it's cooling requirements aren't too bad.
    05 2500HD CC LB LLY, 4x4, 3.73s 235/85R16's, webasto cab heater, to keep it warm.
    03 Buick Rendezvous - When you average over 80 miles per day driving around, you need one of these.
    85 K-5, 6.2, SM465, Rockwell T221, 1 tons, 36's. More goodies to be installed as time and money allows.
    82 K20, 6.2, SM465, NP208, stock except for bed rack, snow plow, and glow plugs are on a toggle switch. It works great for plowing!
    72 Postal Jeep - Yet another project

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