"Eisboch" wrote in message
. ..
The '05 (maybe other years as well) PSD block heater was an "option".
Turns out that the actual heater is installed (comes from International
that way) but Ford does not supply the wiring harness and it is what is
constitutes the "option". When I was having early problems with the
truck I asked about the optional wiring harness and they gave me one free.
I have never got around to installing it.

I got lucky. I got my truck in NY and the dealer ordered the cord.
Unfortunately, the 6.4 is going to be the same. Below I have posted a link
that gives the instruction to install and route the block heater wire for
the 6.0.

http://www.forddoctorsdts.com/articl...icle-05-20.php

Mark