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,
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.