I'm looking to do the high idle switch install. I hate adding new switches inside the cab.....I'm a big fan of the "stock look". My truck has the snow plow prep package and there's a nice round button by the "air bag on/off" switch for installing a roof plow light. My question is, think I can use that button for the idle switch?


Thanks!

If the switch is On Off yes ...Or Just splice the wire that you run from the pcm to the Dark green/white wire on the brake switch....





Mac http://www.dieselplace.com/forum/smileys/Approve.gif

That is exactly what I did. I wired my high idle to the Dark Green/White Wire pin F on the stop light switch mounted on the brake pedal. Has worked like a charm everytime I show it off. Will be nice to use once it starts getting cooler around here... no switches or buttons need to be added...


Bob

So when you tap the brake pedal it turns the high idle off??


Thats slick!

10-4 on the brake pedal.


I wired it up the same as mentioned with the wire from the brake. I felt the two higher idle speeds were too high for my liking, so I asked my dealer to drop them down a bit using the Tech2. Works much better now, IMO.

I hooked mine up today as well. I did the same as above in regards to the brake pedal. Works like a charm. I also hooked mine up to my remote starter so that I can push the aux button on my transmitter and it will idle up. The real nice thing is that if I push it again it goes back to regular idle. I am very impressed.

^


|_____Is THAT Kermit taking out his frustrations? http://www.dieselplace.com/forum/smileys/Disapprove.gif





Sure gives a NEW meaning to 'stuffed' animal..Edited by: Mic_

http://www.dieselplace.com/forum/smileys/Geek.gifEdited by: Max Power

Cute funny but,
Hey that kinda takes away from some very good info on high idle install,all might not enjoy ... Specially when people come and search for info ...
No offense ....

If you hook it up to the brake pedal way......does this mean that high idle is always on everytime you start the truck?

No, you have to activate it either by the Set or Resume cruise control commands.

Can someone give us a step by step for "High Idle"? Without wiring in an external switch can it be activated/deactivated via cruise control switches?


Where/how is it wired into the PCM?


Quickly glanced through the Duramax Diesel Supplement manual and did not find it. I have not read it cover to cover yet.

Pick,


Here's the directions. http://www.kennedydiesel.com/docs/HIGH%20IDLE%20INSTALL%20FINAL.htm


I still haven't figured it all out yet, but there's lots of great advice from people here. I've ordered the parts and am looking to do it next week sometime.


I still haven't decided which way to go....switch or brake pedal.


My goal is to be able to turn on high idle when I shut the truck off at night, so that I can use my remote start in the morning without having to run outside and turn high idle on.

My goal is to be able to turn on high idle when I shut the truck off at night, so that I can use my remote start in the morning without having to run outside and turn high idle on.





Thats is a real nice idea, but it won't work. It won't automatically go on high idle after you shut it off on high idle. You will need to go outside and press the set button. You could do what I did and wire an aux output of your remote start to activate a relay that provides power on the set circuit of the cruise control button. Then you would be able to turn the high idle on and off with a push of the aux button on your remote start. This is about your only option.


You might as well wire it to the brake switch as opposed to a new toggle switch because there is no advantage to the toggle switch. It will shut off if you hit the brake or press set again on the cruise.

"You will need to go outside and press the set button."


Damn, thats what I was afraid of. I might take the same route you did with the remote start. My remote start is getting installed this weekend and I'll have to see if I have an Aux button....if I do I may ask you (Max Power) some more questions about "activate a relay that provides power on the set circuit of the cruise control button" because that doesn't sound fun if you don't do your homework first.


Thanks again!

I used the PTO switch found on Chassis cabs to wire in my PTO switch for the "factory" look." Take a look here at mine:


http://community.webshots.com/photo/61321434/65655297NlCluF


Disregard the hole above the switch and airbag switch. That's Where I mounted my CB. Works just like a SPST switch, but ALOT more expensive.Edited by: 3-Fan

"You will need to go outside and press the set button."


Damn, thats what I was afraid of. I might take the same route you did with the remote start. My remote start is getting installed this weekend and I'll have to see if I have an Aux button....if I do I may ask you (Max Power) some more questions about "activate a relay that provides power on the set circuit of the cruise control button" because that doesn't sound fun if you don't do your homework first.


Thanks again!





Actually it is very easy. You could ask the installer of the remote start to hook up an auxilary channel of the remote start to provide a positive pulse to the cruise control set wire (blue) when you push it. If you printed this out for him he should understand. Most remote start installers should be capable. If they are not capable then I wouldn't get my remote start installed there. A relay costs less the $10 and shouldn't take more then 10 minutes too hook up. Then you will be all ready for when you install the high idle. I don't know where you are in US but I would do it for you for nothing if you were close enough to me to make it practical. I am in Manitoba, Canada.

I used the PTO switch found on Chassis cabs to wire in my PTO switch for the "factory" look." Take a look here at mine:


http://community.webshots.com/photo/61321434/65655297NlCluF


Disregard the hole above the switch and airbag switch. That's Where I mounted my CB. Works just like a SPST switch, but ALOT more expensive.






Do you happen to have the part # for that?


On second thought that won't be much good to me. I have an '03 and there is nothing but a hole there http://www.dieselplace.com/forum/smileys/Disapprove.gifEdited by: Max Power

Max power and others with remote start, what brand remote start are you using, i want to add one on my truck and was wondering which ones seem to work/last the best last thing i want is electrical trouble down the road from a inferior product.. And about how much $$ are we talking for these systems in US$$. Also how can you tell who the good remote installers really are, when you go into these places they all tell you they can walk on water, but it looks like they got a bunch of 18 year olds out there doing the work in the shop after school, granted there are a lot of young guys who know there stuff but I'm not real thrilled to let anyone go cutting wires in my $42k truck





ALso i like the high idle switch off the remote start makes good sense, I'm very handy with tools and working on engines (i build my own motors for my racebikes) but am not over thrilled with playing with wiring and electricity, how hard is the high idle install for "average joe" who is not an electrical guru??





Thanks!


Edited by: gsxr1216

Max Power,


Thanks for the info and offer to help install. (darn, I'm in Michigan).


What does the relay do...and do I need any specifications when I go get one?

Unfortunately you can't really know who is good and who is not. Choose a shop that you feel comfortable with and insist on their best installer. There will always be one guy who is the best in the shop and the rest just know how to get the job done.


Personally I think Astro Start is the best on the market. You will likely have a hard time finding a company that sells Astro start because they are a canadian company. Their web site is www.astroflex.com (http://www.astroflex.com) We have had 1 failure out of 1000+ we put on last year alone.

Most shops say that anything made by DEI is the best. Personally I think they are over rated and over priced. Their products are Viper, Python, Avital etc. www.directed.com (http://www.direceted.com)


There is always the option of doing it yourself. It is really not that hard and all that is required is a basic understanding of electrical and knowing how to solder. I was thinking of putting together a how to with pics for this site but haven't got around to it yet. And there are lots of different ways to do things. Plus I am already done mine so I would have to wait for another diesel to come along. Still I will try my best.


Our trucks have what is called a passlock II security system. You need to bypass this system for the remote start to work. I HIGHLY recommend you insist on this particular bypass system. http://www.bypasskit.com/pldata.asp Most other systems try to fool the passlock system into thinking the proper key is in the ignition by using the same resistance as the factory key would be. It is more complicated then this but to make a long story short, these bypasses commonly fail. This then puts your truck into a armed mode and the truck won't even start with the key witout leaving it sit for 1/2 hour. This pldata will never do that and it bypasses through data rather then resistance. We have found this to be 100% effective.


There are 1000 other things I could go into detail about but I don't have time at the moment. Edited by: Max Power

Max Power,


Thanks for the info and offer to help install. (darn, I'm in Michigan).


What does the relay do...and do I need any specifications when I go get one?






The relay basically just converts the negative output of the remote starter to a posative pulse that works with the high idle. (simulates pressing the set button) To be quite honest, if the installer doesn't understand how to do this he shouldn't be installing your remote start! This is simple, simple stuff.

Can anyone explain the difference in this method of a high idle listed in the http below vs the original method using c-71? Does the one method using the green wire on the brake switch require a toggle switch? advantages to any of the methods?


Engineer Bill


https://www.gmupfitter.com/secure/html/publicat/bull/bull63.pdf

Does the one method using the green wire on the brake switch require a toggle switch? advantages to any of the methods?


Engineer Bill


https://www.gmupfitter.com/secure/html/publicat/bull/bull63.pdf





That's the beauty of using the brake wire; no toggle switch required. As soon as you step on the brake pedal (which you have to do to place the truck in gear anyway), the idle signal to the ECM is removed and the engine returns to normal idle. Essentially, the brake pedal is the toggle switch.


There is some confusion between high idle and fast idle which are two seperate conditions. I ran into the same thing when reading through the GM Upfitter publications. Use the procedure that was provide in a link above and that will take you through the process. There are a few subtle differences between the '03 and 01-02' trucks, but the wiring is the same. '03s only have two high idle speeds, 1150 and 1850 or thereabouts.

I feel really dumb asking this but I hear so much about it but... What does the high idle do? Is it something I should think about doing to my truck? I am really interested in what everyone is saying about thier remote starters. That is next on the list. But I was just wondering what the high idle switch does and why you do it.


Thanks guys,


Mike

bybycop, the high idle switch does exactly as it sounds. It increases the idle to 1150rpm or 1750rpm. Some people use it for better charge from the alternators if running an inverter. I use mine to warm it up quicker in the winter. Some people just do it so they have all the toys http://www.dieselplace.com/forum/smileys/Big Smile.gif The reason our trucks have the capability is in case you run a PTO in which you would need higher RPM to have the pto spinning at the right speed. It is really easy to do, costs almost nothing and it will be there if you need it. If you not, no loss as the truck will idle normally.

bybycop-


Living in NV you more than likely won't need it for faster warm ups, but here in MN it gets a bit chilly so I wired it up. Should help when warming up the truck as I'm loading my ice fishing gear after a cold day on the lakes and also after work.

I just had my fast idle put in . It uses a toggle switch to kick it in. I think I will have to take it back in to be reset. It is suppose to have 3 speeds. approx 950, 1250, and 1750. The problem is when I flick the toggle switch for only the 950rpm it runs perfect for about 1 minute then starts flucuating up and down between approx 700-950. Any one know it is doing this.???. At the faster rpm,s it does not do this. The other 2 speeds are set with the cruise button and resume button. Please help.

Thanks for the explanation!!! Just wondering if there was another toy that I should look into. I can definately see how It could help in the cold climates. Cant say that I suffer from the cold here.http://www.dieselplace.com/forum/smileys/Big Smile.gif Thanks for the help though!


Im going to keep watching this post for remote starter info though.


Thanks,


Mike


P.S. Minn-Kota, are you excited for a particular package to come????

What is Tech 11 to adjust idle speeds???

Just completed my high idle istallation. Installation went very well. I had to have my son find C-71 for me!. Used the dark green/white wire on the brake switch and connected the wire directly to the C-71 connector on the ECM. I now have 1150, & 1750 RPM high idle. Also tested the cruise and it works fine.


Thank for the information which made this an easy installation.


Engineer Bill

Same here...did mine this afternoon. Works great! A hearty thanks to 4x4man for walking me through the mod. He had done it a while back on his truck and helped me do mine. This board, and the folks that hang out here are the greatest! http://www.dieselplace.com/forum/smileys/Clap.gifhttp://www.dieselplace.com/forum/smileys/Clap.gifhttp://www.dieselplace.com/forum/smileys/Clap.gif


John

John-


Your welcome for the help, it was good to get together and spin some wrenches again!! Thanks again for your help installing the Nick kit on my truck. I guess your up next with some gauges and stuff, huh??!! http://www.dieselplace.com/forum/smileys/Big Smile.gif


Bob

Me three! Who would of thought that three Diesel Place members did thier high idle install todayhttp://www.dieselplace.com/forum/smileys/Big Smile.gif I also used the green and white wire on the brake switch, works like a charm.

OK, i've read the install info from kennedys and some of the things people did here, i must be a little thick this morning.....http://www.dieselplace.com/forum/smileys/Ermm.gif





??? it appears from the instructions that you put a wire to the ECM, and apply 12v (say a toggle switch) to it to activate the high idle system, but this does not turn it on though still right? you then still need to hit the cruise control buttons to rev it up off of low idle???


If the above is true how can using the brake pedal be used to activate the system? that would only be a momentary 12v+ pulse and then you still need to hit the CC buttons to actually rev it up???


If using a remote start (what i want to do eventually) it seems to me (i must be missing something..) that you would need two circuits, one to supply 12v constant via relay (to simulate a toggle switch) and also another relay to "pulse" the CC circuit to simulate the CC buttons being pushed???





Could someone tell me what I'm missing here?





Thanks!

gsxr, the green/white wire on the brake pedal switch is LIVE +12v all the time untill your press the brake. Then it goes Ground. This is not the brake light wire but rather the torque coverter wire. So to install high idle with a remote start all you need to do is pulse the cruise set wire (twice) to enable high idle because the wire at the ECM for high idle is already getting +12v.

Max power, OK that makes sense and was as i thought, but answer me this.... I keep seeing that they all say (ie kenedy install sheet for the high idle) make sure the high idle is off or the truck will accellerate badly, ETC. if the brake wire is live all the time then wont it think its in high idle and act wierd?? My impression of kennedys install is a toggle switch to supply 12V+ (to ECM) to "activate" high idle system, then you need to hit the CC button to actually rev it up. Seems like using the green white the truck will be in high idle mode ALL the time, and as soon as you hit the CC button (in park of course) that it will rev up??? I missing something with Kennedy saying make sure the high idle is off (IE no 12V+ supplied to ECM) and you guys who are keeping it feed all the time with 12V+?? Do you see my confusion?

gsxr 1216


I had the same confusion! As you see in my quote, "Also tested the cruise and it works fine." I drove to work today, about 20 miles to and from and tested the cruise again many times and all works fine.


EngineerBill

I am assuming here (so someone please correct me if I am wrong...like I really have to worry about that here...hehehe http://www.dieselplace.com/forum/smileys/Approve.gif), since we are talking input signals to a computer, we have to remember that the programming is looking at a number of different inputs to get a desired result. What we are tapping into here is existing programming for high idle that was put in place for systems with a pto, for those times that more engine power is required to drive the pto. When in park (condition one), with power supplied to C71 (condition 2), and either the cruise control button (C3) or cruise resume (C4), the engine control computer will go into one of two pre-programmed high idle conditions. Remove power from C71 (tap brakes to make it go ground), and then computer returns to normal idle. Now, put it in drive, and condition one is no longer met. Once speedo is above about 30 mph, the computer will treat the cruise control inputs normally.


Just taking a guess here, but I think at a high level that is esentially how it works.


John

As a followup to my previous post, if you choose to use a switch vs. the brake line, and if you don't turn off the switch and have gone into one of the high idle condtions, the computer can get confused if you put it into drive. Since you have to apply the brake before you can take the auto trans out of park, you always turn off the high idle before going into drive.


John

Busy weekend.....installed High Idle, installed Nicktane, and had remote start installed.


My ? is for MaxPower. The installer that did my remote start wants to make sure that the set button on the cruise control is 12v. He didn't have enough time to do the Aux button to Set button. He told me to find out for sure that its 12v and he'd install it next weekend.


Thanks again.

Yep guaranteed +12v. It is a blue wire and you can see that it comes from the side of the column with the cc switch. There are 2 or 3 blue wires so tell him to check with a DMM (digital multi meter) Make sure the ignition is on and if you have the right wire it will go +12v when you press set. Good luck!





I knew I should have taken pics.

OK, I think I have read it all and still have a question for you guys. I would like to put this on my truck and wire it off the brake pedal but, I don't have an auto. I run the 6 speed so, I don't have park. How will this effect things? Does this eliminate the ability to wire it to the brake pedal?





Thanks

Correction on the following statement :



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<TD class=bold width="20%" background="" bgColor=#fefefc><A name=7469></A>Max Power</TD>
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<TD class=smText noWrap>Posted: 28 September 2003 at 8:39am | IP Logged </TD>
<TD align=right width="100%">http://dieselplace.com/forum/forum_images/quote_icon.gif (http://dieselplace.com/forum/post_message_form.asp?mode=quote&amp;PID=7469&amp;FID=1&amp;TI D=610&amp;TPN=2)</TD></TR></T></TABLE></TD></TR>
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<TD class=text vAlign=top background="" bgColor=#fefefc>gsxr, the green/white wire on the brake pedal switch is LIVE +12v all the time untill your press the brake. Then it goes Ground. This is not the brake light wire but rather the torque coverter wire.</TD></TR></T></TABLE>





The Dark Green/White wire, wire 1135, supplies 12V power to the A/T Shift Lock Control Solenoid only, and not the torque converter. Reference 2002 Helms page 7-170.


As explained before, this wire is hot ONLY when :


-keyswitch is in Run or Start, AND


-transmission is in Park, AND


-brake peddle is NOT depressed.


With this 12V signal to pin C-71, the Fast Idle is now "Enabled". With the Cruise Control positioned to "On", depressing the "Set" Pushbutton twice sets RPM to 1250, and depressing Resume/Accel selects 1750 RPM.

Camp,


I have an 03 gmc with a 6 speed and it is different. The green/white brake wire has no voltage to it at all. I used the purple wire in the same harness and appeared to act like the green/white..power-hit the brake-no power. Hooked it up and the high idle works great but no preformance. Real dog could not hardly get to 2000 RPM. I added a switch to turn off the power and now all works well. Bottom line.. use any 12v source and a switch and all will be well.


Steve

bigski1, Thanks!! That is what I was looking for. I don't get to see my truck again until the end of Feb. but, I am trying to get all next years mods ready now. That way I can attack it when I get homehttp://www.dieselplace.com/forum/smileys/Big Smile.gif

Had an idea I wanted to run by you guys. My buddy and I were discussing the power source for the wire with a manual tranny. I wonder if we could use the indicator signal to the parking brake to power on and off the high idle? That should still allow us to use the cruise to adjust what rpm but, since I use my parking brake everytime I leave my truck, I would have power to the system when I turned the key on and took the truck out of gear. Does this sound reasonable to you guys?