Doing "High Idle" mod
Thread Starter
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I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Doing "High Idle" mod
Thanks for the info for the High Idle mod, this site made that easy. Now I'm searching for information on the other wires on driver side:
Orange/White
Green/white
yellow/white
all with tape on ends. What would these be used for?
Then, I'm assuming that the other 4:
Red
Blue
Black
White
Are pass through wires. Used for other add ons. Right?
Which I would have to route through the fuse box?
I have a 2004 F350 4x4 CC SRW LB KR
Thanks in advance
Orange/White
Green/white
yellow/white
all with tape on ends. What would these be used for?
Then, I'm assuming that the other 4:
Red
Blue
Black
White
Are pass through wires. Used for other add ons. Right?
Which I would have to route through the fuse box?
I have a 2004 F350 4x4 CC SRW LB KR
Thanks in advance
Logistics Pro
Joined: Mar 2007
Posts: 4,604
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From: Claremore, OK
Freshman User
Joined: May 2009
Posts: 41
Likes: 0
From: Newport, Tennessee
I did the "high idle mod" a few months ago and have been pleased with the results. Keeps the air on in the summer and heat in the winter and the dogs are much more comfortable
As for the other wires: the 3 multicolor wires are part of the "high idle system". One is for the variable idle, one is to actually vary the idle speed, and the last one is a signal wire (to wire into an LED to show that the idle is on). I don't remember which one is which, but I'm sure a forum search could find out.
The solid color wires are pass through just as you suspected. If you have lights, winch etc. you may want to wire them up to the fuse box, but most accessories have in-line fuses.
As for the other wires: the 3 multicolor wires are part of the "high idle system". One is for the variable idle, one is to actually vary the idle speed, and the last one is a signal wire (to wire into an LED to show that the idle is on). I don't remember which one is which, but I'm sure a forum search could find out.
The solid color wires are pass through just as you suspected. If you have lights, winch etc. you may want to wire them up to the fuse box, but most accessories have in-line fuses.
Freshman User
Joined: May 2009
Posts: 41
Likes: 0
From: Newport, Tennessee
Try the following link it describes the wiring uses for the PTO and the High Idle.
https://www.fleet.ford.com/truckbbas...df/155-158.pdf
https://www.fleet.ford.com/truckbbas...df/155-158.pdf
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Laughing Gas
Joined: May 2005
Posts: 1,082
Likes: 1
From: Illinois
Here is another link that includes the schematics: https://www.fleet.ford.com/truckbbas...l/upfitter.pdf
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Hotshot
Joined: Jul 2005
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From: Middle Tn.
I did the "high idle mod" a few months ago and have been pleased with the results. Keeps the air on in the summer and heat in the winter and the dogs are much more comfortable
As for the other wires: the 3 multicolor wires are part of the "high idle system". One is for the variable idle, one is to actually vary the idle speed, and the last one is a signal wire (to wire into an LED to show that the idle is on). I don't remember which one is which, but I'm sure a forum search could find out.
The solid color wires are pass through just as you suspected. If you have lights, winch etc. you may want to wire them up to the fuse box, but most accessories have in-line fuses.
As for the other wires: the 3 multicolor wires are part of the "high idle system". One is for the variable idle, one is to actually vary the idle speed, and the last one is a signal wire (to wire into an LED to show that the idle is on). I don't remember which one is which, but I'm sure a forum search could find out.
The solid color wires are pass through just as you suspected. If you have lights, winch etc. you may want to wire them up to the fuse box, but most accessories have in-line fuses.
Lead Driver
Joined: Nov 2007
Posts: 5,139
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Resident smarta$$
Joined: Aug 2006
Posts: 4,929
Likes: 9
From: Oaks,PA
I have a quick question, as I've thought about doing this mod. When you activate the "high idle" upfitter switch what rpms are you seeing? The only time mine really idles is in the AM and after work, in the colder temps for 5-10 min. Mine kicks up to @1000 rpms after @ 2 min. Just curious, thanks for any replies 
Thread Starter
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I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Mine, normally on cold mornings, on it's own, goes to about 850. I've never seen it get higher than that. (Coldest "unplugged" start has been 10F) I've never timed it, but it takes a while(a few minutes or longer) to have it idle higher.
"high idle" mod takes it straight to 1200. I will be careful to let oil pressure come up a bit before setting it to 1200. Just seems to make sense.
2004 f350 6.0L CC LB King Ranch
(Put some "upfitter switches in, pics in albums)
"high idle" mod takes it straight to 1200. I will be careful to let oil pressure come up a bit before setting it to 1200. Just seems to make sense.
2004 f350 6.0L CC LB King Ranch
(Put some "upfitter switches in, pics in albums)