It will operate fine without it. Mine has been out of housing for 4 years and no problem. I do not recall if it is on all the time, but I think it is. Hope this helps.
97 F250 ExtCab 2 wheel drive long bed.Mods: cOOn 10K and 6637 Air Filter. Shimmed fuel pressure regulator.3" Down Pipe Cat Ran Away. 140 volt IDM. 3rd Generation Flux Capacitor and Rolls Royce battery water. More to come.
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