Swamp Donkey (from the ford-diesel.com forum) has a page on it, and his math is as follows:
Tire Circumference = Tire Diameter x 3.1416 (Note that this does not take into account the squat of the tire when loaded. To allow for that, I used a tire diameter of 41", although the actual height was 41.5")
Revolutions per Mile = 63,360 / Tire Circumference in Inches
Conversion Constant = Tire Rev per Mile x Teeth on Sensor Gear / 8,000
(The number 63,360 is inches per mile; 8,000 is a the number of pulses per mile the PSOM needs to be accurate.)
The number of teeth on the sensor gear in an 8.8" is 108. Instead of figuring your revs/mi, you might try looking them up on the tire MFG's page... it's more accurate (unless you know your exact tire diameter).
If you want to see his page, it is HERE
He has some really cool custom fabrication stuff on his page.
As far as the wire, it was just a grey plug with a single wire hanging under my glovebox somewhere, and said PSOM on the side of it in white letters. Just take a wire and stick it in there, and then stick the other end of a good ground... just get a long wire and hook it into the battery ground clamp.
You probably can find the button pushing procedure, if not just ask.
is loaded huh? Does it have Power Engine?
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