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But for FE, I'm thinking why bother spending the money on an electric fan conversion when I can get a better FE solution with just a fan kill switch.
Dovetails with my concerns: don't make changes you may not be able to afford to fix if the truck is needed to work extra hard (even beyond GCWR spec) and money is desperately needed elsewhere.
I'm looking forward to what you find. The back & forth power conversion doesn't look worthwhile to me purely from the standpoint of complication (and being non-OEM on a $16k long-block).
Think you could post the FSM schematic for where the switch will be installed? (as is convenient) Will you also install a flashing dash light or other in the event of forgetfulness? I've run down the road for hours in a Class 8 where I had overridden the auto function and manually turned the fan on . . . just forgot to turn it back off.
NeilBlanchard, although there are several important changes between his truck and mine in just three model years, my fan starts from the moment go. I haven't run the truck in about 5-days. Temps are in the mid-80's. With no A/C or other the fan starts with the engine, but almost free-wheeling. It is also of plastic or composite construction; very light in weight.
With a hot shutdown (relatively) and A/C engaged in summer temps, the fan not only comes on, but comes on with greater percentage engagement.
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