As the snorkel intake-routing evolves, there's an opportunity to tap the fan-switch into the modified thermo housing (no hose T required). Of course, this reflects my pants'-seat, on-the-fly, near-sighted, advance total-systems-planning lameness.

Anyway, I'll post results/PNs&$/specs/pics post-install.

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'15: bought '05 w/138k.
'16: HG/Rockers/ARPs/Thermo/H20pump/TbeltKit/ Seals/ Mounts/Kennedy fuel pump.
'17: bought manual Gas donor for its' ARB F/R Airlockers, OME 2.5" lift (gas-rated), JBA UCAs, ARB bumper.
'19: Trans w/Suncoast/Transgo/HDdiscs, new OME CRD-rated lift, electric tri-fan setup, BlackMagics/Centric Premiums, Airbags.

Please try to have it done within the next 30 days so that I can copy you.

I can't take credit for these pictures, but I remember saving them back in the day. No it's not automatic like you wanted but I thought the concept would be helpful to you.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.