I bought a replacement cluster for my f150, already programmed to my correct
mileage and the key memory was blanked out at the vendor.  They said as long
as I had a key without an "S", and one or more with an "S", one most likely
was a master and the others are slaves...well that is not the case.  All 3
of my keys must be slaves as now I have the theft light on.

The original problem is the odometer does not always display but I am told
the miles are correct.  My dealer wanted $475+ to R&R my cluster and replace
it.  By doing this on my own, it's about $200 with my own labor.   I am also
going from an XL to an XLT cluster to get the tach benefit.  I wonder if
there is a secret warranty on the odometers - isn't displaying mileage a
federal requirement?

Can I reinstall the old cluster and start the truck?

The only other choice I have is to have the truck towed to the dealer 1/2 hr
away where I bought the truck 2 1/2 years ago.  I remember when I picked it
up, I had already told them I wanted a 3rd key, and they forgot to program
it and tripped the PATS.  Somehow they corrected that condition that night,
even though service was already closed.
Rocky