Ya the yellow w/ green strip is the correct wire I have not hear of any problems. I can't find the thread now maybe someone else can, hook to 3 or 4 upfitter I think they are the low amp ones check the owners manual

 

Thats the one you want, wont harm anything and keeps rpm's at 1200, its how I hooked mine up. Also switch #3&4 are the low apm ones:thumb:

 

cool thanks alot guys, i put it on the 4 aux switch due to the 10 amp fuse, sounds like ive got it handled thanks again guys.

 

all these wires are located under the dash by the parking brake, correct?

 

Anyone got a write up for this?

 

No doubt. What is the SEIC wire, and is that the one to wire to the #4 upfitter switch?

 

I would love if someone would tell me the steps on how to do this especially with winter approaching here in Alberta

 

I didnt even know this could be done.

 

There was a thread about it some time ago, but the directions were cross posted from a ford tech site........not in plain english and not easy to understand. I couldnt make sense of it.

I just want to know which wire is the SEIC and if all i do is connect it to the #4 upfitter.

 

Don't know if I am allowed to link to another site so I'll copy/paste


Ok here is a quick run down of how to do the high idle mod.

First locate the wire harness under the dash, near the OBDII port.

The lower part of the harness with the most wires in it, is the pto harness, You can see in the picture that everything is labeled, you want to find the PTO wire, on my truck its labeled as yellow with a green chaser.



Then i used the #4 upfitter switch to tie into it which in this case the wire is brown. I chose the number 4 switch because it is the lowest amperage of all of the switches (5 amp)


As you can see i just used a butt connector to make the connection, you dont even need to put a jumper wire in, you can just tie the two wires together and your good to go.

To make the high idle work you MUST have the park brake on and the truck has to be in Park. Flip your switch and it should high idle in a couple seconds.


If you do not have upfitter switches in your truck its the switches in your truck, then you will either have to wire a switch up yourself that provides 12v to the pto wire OR you can just hook a hot wire to the pto wire and leave it all the time (not recomended) If you chose to do it this way, any time you are in park with the park brake on it will high idle.

 

Yellow wire with green chaser to brown wire puts it on upfitter switch 4.....about as simple as it gets

 

Yup. I just did it this morning. Took 2 minutes. The PTO wire bundle comes off of the main harness just fwd of the OBD port. Its wrapped in white tape and all the wires are capped. The white tape indicates what is what. Lots of them say PTO...along with something else. The one you want says only PTO. My truck is a 10', and it is the yellow with green chaser. Same as listed on the 08's. I would venture to guess its yellow with green tracer on all 6.4's. The Upfitter #4 wire is small gauge brown. Connect the two, put your park brake on with trans in park. Flip the switch and revs will slowly increase to 1200. Bingo.

 

Nice glad to hear you got it working

 

6.4 high idle mod

Anyone have any pictures of this mod done?

 

6.4 high idle mod

I just did this mod took me one minute. It works, i just wont need this tell it gets colder in Texas.

 

This is such an easy mod. Why wouldn't ford do this from the factory?

 

ford said they could hook something up for me and it would cost about $300 i just did this this morning and literally took 2 min thanks guys

 

After using the high idle just once I threw code p162e now if I try to flip uprights switch 4 a wrench symbol comes on my dash and high idle won't work the only way it will work is if I clear the code. Any ideas?

 

Sorry to jump in here but why would you want your truck to idle high? My truck does it when ever it goes into regen and I come to a stop with my foot off the brake or if I put it in park, but it i step on the brake it goes back to normal, is this normal? I figured it was a regen thing, are you guys just speeding up the warmup?

 

I deleted the dpf and yes that is normal for yours but sounds like you could use a flash update and I work where my truck idles a lot and in high idle the exhaust temp stays above 275 and avoids gumming things up

 

here is a wiring diagram of all customer accessible wires:
https://www.fleet.ford.com/truckbbas/non-html/2008/bb_pdf/349.pdf

here is definitions for the wires abbreviations:
https://www.fleet.ford.com/truckbbas/non-html/Q162R1.pdf

hope this helps explain all options, i went the battery charge protection mode, it works well and adjusts rpm's depending on electrical load.

 

Mine dosent work. I connected the yellow with green stripe to the brown and get nothing. Mine is a 2010. Any suggestions? The light on the switch lights up when I flip it up so I aussume there is power. Any help is appreciated. Thanks

 

If you conneced the correct wires, have a good connection, and the parking break is engaged.......it will work.

 

Same thing happened to me when I used a but connector so I took it off and just twisted tge wires together taped them up and now it works

 

just did the mod in about 2 minutes in my driveway thanks for the adivce!

 

I just did this mod and was super easy. I am new to the diesel world and am wondering if you have to wait any certain amount of time before turning this on or can you just hit the switch right away on any cold morning??? Thanks

 

On the 08s at least #3 is 10amps and #4 is 15amps. Not that it matters for what we are using it for in this case.

https://www.fleet.ford.com/truckbbas/non-html/Q117.pdf
Scroll down a bit for the 2008 stuff

 

I just did this in 2 minutes. It must drink some gas when it's engaged...

 

To those that have done this high idle mod and are running a tune:

How much coal are you rollin? Pics? Is it noticable at all?

 

There is no coal. No smoke. Maybe a haze depending on your tune, but otherwise there should be nothing.