The Mod
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Disclaimer

For 2005-06 Elevated Idle Mods CLICK HERE
Please note, this modification will not work on trucks equipped with manual transmissions.
Click HERE for details.
Well, I don't know if you can really call it a modification since Ford provides all the info. See the 2003 Body Builder Layout book, page 199 (this is a PDF file so you'll need Adobe Acrobat reader to view this file). Ford provides truck body builders and upfitters a way to alert the PCM that PTO (Power Take-Off) operations are running. When 12 volts is applied to wire 322 (LB/Y), which runs directly to the PCM, the PCM elevates the idle to 1200 rpm. High idle also comes in handy on cold winter days for warming up the engine and preventing wet stacking.
You provide the switch, wire, splices and about 45 minutes. Ford provides the two wires you'll need to hook together. The indicator light is optional, it's not needed for the circuit to work. Also note, a LED can be used along with a series resistor of the correct size.

Wire 322 is a light blue wire with a yellow strip. It is located in the customer's upfitting wires bundle directly behind the parking brake release (note the release cable in the upper right corner). It will be taped in with the other wires. In this picture the wire is pulled out of the bundle. It's capped with tape as is wire 294.

Wire 294 is a white wire with a light blue stripe. It is located on the right hand side of the driver's area. Locate the OBD II connector. Follow the wire bundle off the back side of the connector about 6 inches up. Wire 294 may be sticking out as in this picture, or it may not be. Look around, it there somewhere.
Use a toggle type switch of your choosing and mount it in whatever location works for you.

But of course the standard disclaimer applies. I'm not responsible for want you do with the info or it's accuracy. In other words if you use this site to service your truck and break or screw something up, don't come crying to me about it. You, the viewer, are totally responsible for want you do with the information on this site. If you can't live with that, then don't view it or use it. This site should only be used as a reference and introduction of the 6.0L Power Stroke diesel engine.

On the other hand, if you see an error or have a comment e-mail me at: dan@prxy.org

OK, disclaimer blah blah blah........ I did this mod on my 2003 F-350 and it worked. When the switch is turned on the idle slowly climbs to 1200 rpm and holds there. When the service brake is applied the idle quickly drops back to 650 rpm. As far as I know, this mod should also work on a 2004 MY truck, but I have not confirmed this to date. Good luck and say no the wet stacking.

Installed AIC circuit. I chose to use a micro toggle switch. The switch has a build it LED. Unfortunately the switch couldn't be used to connect wire 294 to wire 322 directly. When the switch was open, their was about 8K Ohms between the poles. My idea of a switch is it should have a lot more resistance then 8K Ohms when it's open. So I used the switch for what it was designed for, to energize the coils of a relay.
Wire 294 (WH/LB) comes off of fuse 29, Customer Access. It's a 10 amp fuse on the right hand side of the fuse box.

Results:
Normal idle is around 650 rpm.
Transmission in neutral or park and service brake off.

Press the little button on the dash and........

Hey, how did you get the odometer to display the Rpm?

Read the Odometer Trick.

The idle will slowly moves up to 1,200 rpm. Step on the service brake pedal and it will fall back to 650 rpm.
2003 Body Builders Book Page 194................

b. "Elevated Idle Feature": this feature is inherent in the powertrain control modules of diesel engine vehicles ordered with "Transmission Power Take-Off Provision". Activating the Ford "PTO Circuit" will automatically elevate the engine idle to 1200 rpm in "PARK" or "NEUTRAL" regardless of the parking brake being set.

This feature does not require use of the Auxiliary Idle Control option or APCM module.

This feature is not available for manual transmission.

Also see: https://www.fleet.ford.com/truckbbas/non-html/4-6literseif.pdf .


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Last Updated: Wednesday, February 01, 2006