High idle mod
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Senior User
Joined: Oct 2011
Posts: 194
Likes: 0
From: Myrtle beach SC
High idle mod
I tried looking in the tech folder and was unable to pull it up. Would it be worth installing one on my 04. Also if anyone could please help with install procedures. I don't let the truck idle to long other than when I'm in Ohio in the winter. Also is this something that I should use whenever I leave the truck idle. Any help is really appreciated. Thanks.
Posting Guru
Joined: Jun 2006
Posts: 1,590
Likes: 0
If you want to make it look professional, like it came with the truck, use the OEM upfitter switches... The whole kit can be purchased for about $100 if you already have the electric brake controller in your truck. If you don't, then the kit runs about $130 because you have to buy the tray that goes with it. If you're interested, I'll post up the part #'s you need.
I ordered them from ebay. I received the switches, the relays and the extra tray which I didn't need because I have the OEM electric brake controller. It makes a much more professional look to the install. I used Aux4 and the purple/light green wire going to Aux4 of my upfitter which connects to the orange/light blue 10Amp switch wire. Instructions below. The hardest part is routing the wiring harness to make sure that your glove box and the dropdown under the upfitter switches closes. If you don't route the wiring harness properly, you won't be able to close either one. If you have the brake controller already there (like I did), you can get by with just ordering the switches and the relays. It's about $40 cheaper.
Followed this writeup which is 1000 times better than any I found on the internet.
http://www.dfuser.com/Install%20Guid...20Switches.pdf
I ordered them from ebay. I received the switches, the relays and the extra tray which I didn't need because I have the OEM electric brake controller. It makes a much more professional look to the install. I used Aux4 and the purple/light green wire going to Aux4 of my upfitter which connects to the orange/light blue 10Amp switch wire. Instructions below. The hardest part is routing the wiring harness to make sure that your glove box and the dropdown under the upfitter switches closes. If you don't route the wiring harness properly, you won't be able to close either one. If you have the brake controller already there (like I did), you can get by with just ordering the switches and the relays. It's about $40 cheaper.
Followed this writeup which is 1000 times better than any I found on the internet.
http://www.dfuser.com/Install%20Guid...20Switches.pdf
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
Not sure but I think it's possible. IIRC ZHilton put them in his 03.
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Cargo Master
Joined: Jan 2011
Posts: 2,791
Likes: 8
From: Edmonton AB, Canada
Did the high idle mod on my 06 and I was a matter of connecting 2wire that were within 3" of each other under the dash. Now my #4 uplifter is the high idle switch.
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I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Since he doesn't have the OEM switches in his 04, he will need to add one.
It is simple to do.
Find the white wire with blue stripe near the OBD2 port. Run it to a switch you install.
Then find the light blue with yellow stripe wire behind the fuse block. Put it to the other post on the switch. Done. You now have high idle mod.
If you get a switch that has a light, the third post goes to ground.
Video of wires:
My switches:
It is simple to do.
Find the white wire with blue stripe near the OBD2 port. Run it to a switch you install.
Then find the light blue with yellow stripe wire behind the fuse block. Put it to the other post on the switch. Done. You now have high idle mod.
If you get a switch that has a light, the third post goes to ground.
Video of wires:
My switches:
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
Bill, just aheads up, I know those blue, tag-on connectors are convenient (post #3). But I promise, they are a guaranteed problem in the future. Maybe not this year or even next year but you will have to put your hands on it again. I can't tell you how many problems I've fixed just removing those things from a vehicles lights and stereo systems wiring. They should not exist (lol). If you don't want to solder/heat shrink(preferred method), the best alternative is to cut the wire and use a butt splice- 1 wire in one end and 2 in the other. Even a wire nut is a better option.
Cargo Master
Joined: Jun 2007
Posts: 2,723
Likes: 5
From: Roseburg, OR
Bill, just aheads up, I know those blue, tag-on connectors are convenient (post #3). But I promise, they are a guaranteed problem in the future. Maybe not this year or even next year but you will have to put your hands on it again. I can't tell you how many problems I've fixed just removing those things from a vehicles lights and stereo systems wiring. They should not exist (lol). If you don't want to solder/heat shrink(preferred method), the best alternative is to cut the wire and use a butt splice- 1 wire in one end and 2 in the other. Even a wire nut is a better option.
Elder User
Joined: May 2010
Posts: 520
Likes: 1
From: Alabama
i did this mod on my 05 an wired it ino my parking brake. all i have to do is push the parking brake down one click an it engages my hi idle. kicks it up to 1200 rpm. i dont have the upfitter switches an didnt wont to drill any holes in my dash. just have to use a test light an find the wire from ur parking brake switch thats hot when u push it down. an wire ur hi idle into it.
Junior User
Joined: Oct 2012
Posts: 67
Likes: 0
i did this mod on my 05 an wired it ino my parking brake. all i have to do is push the parking brake down one click an it engages my hi idle. kicks it up to 1200 rpm. i dont have the upfitter switches an didnt wont to drill any holes in my dash. just have to use a test light an find the wire from ur parking brake switch thats hot when u push it down. an wire ur hi idle into it.
Posting Guru
Joined: Jun 2006
Posts: 1,590
Likes: 0
Bill, just aheads up, I know those blue, tag-on connectors are convenient (post #3). But I promise, they are a guaranteed problem in the future. Maybe not this year or even next year but you will have to put your hands on it again. I can't tell you how many problems I've fixed just removing those things from a vehicles lights and stereo systems wiring. They should not exist (lol). If you don't want to solder/heat shrink(preferred method), the best alternative is to cut the wire and use a butt splice- 1 wire in one end and 2 in the other. Even a wire nut is a better option.
