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I've done it to my 05 6.0l Ex and it Works
I've pasted my post from another forum about how to do it.
PM me if you have any questions
All you late model Excusion owners can have SEIC (Stationary Elevated Idle Control) and it will only cost you $5.95 and about two hours of your time
(one hour schmoozing your local dealer technician) Here's a brief description.
I highly reccomend if you're not up on the SEIC mod that you shoud do a search and check the tech sections so that you are up to speed with the modification.
Just because this works on my 2005 Excursion 6.0 PSD I have no idea if it will work on yours.
I cannot be held responsable for any oops I just fried what ever.
1)Visit your local dealer with a dozen Dunkin dounuts, and ask the service manager if they have any warrantied PCM hanesses they could cannabilize for you.
(you need one female terminal with wire 2 feet long, any color)
2)Go ahead and install your toggle or I prefer the round rocker switch. The switch will need to be connected to an ignition hot source. Connect the other side of the switch to one of the customer access firewall pass through wires.
3) Remove the drivers side battery cables, battery shield and battery.
4) This will give you access to the PCM. Next you need to remove one of the three PCM connectors. the one you want is the one closest to the fire wall ( connector #C1381a ) To remove the connector push the grey lever on the top of the connector towards the passenger side of the vehical.
5) Once you have the connector removed disassemble the black shroud from the back of the connector to do this gently release the four barbed tabs with a scratch pick and remove the cover.
6) Load a 9/64 bit in your drill, hold the connector horizonally in your left hand, locate the empty socket on the right hand vertical row of sockets, second from the top this is socket # 12. GENTLY drill the socket out ( the back of my connector had some plastic "flash" in it preventing the socket from fitting into the connector.
7) Get out your trusty Hot Melt Glue Gun and pre heat it.
8) Insert the socket salvaged from you local dealer into the back of the connector, oriented the same as the other sockets in that vertical row.
Hot melt glue the socket in place from the back side (the side with the wire)
9) Once the glue dries reinstall the black shroud to the connector, tie wrap your new wire to that connectors bundle and route it towards the firewall
(I fished mine through a new split loom in place already that I had run for my driving lights)
10) Connect your new wire to which ever through the firewall wire you're using.
11) Re-connect the PCM connector to the PCM. To do this gently push the connector on the socket, Hold your mouth just right and wiggle and jiggle the grey lever until it pulls the connector home and snaps in place.
12) Reinstall your battery, shield and cables.
13) Ready to test.
Vehical in park, parking brake set, no feet on either the service brake or the throttle. toggle switch off. Start your engine, flip your toggle switch and your engine will idle up to 1200 rpm.
14) You can quit grinning now!
I hope the instructions are clear enough. I'm not much of a technical writer.
When I get some free time I'll scan all the needed diagrams and post in my now empty gallery
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