LB7: High idle switch

dirtymax95

New member
Sep 18, 2014
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What's up guys. Looking to do a high idle switch on my lb7 does anyone who has done it have an extra pin they can send me by any chance? Thanks!
 

02maxstang

New member
Jan 13, 2015
21
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CT
I just did the high idle switch in mine. Im pretty sure I have a few left. ill look after I get off work today.
 

02maxstang

New member
Jan 13, 2015
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And did you just tap into your brake wire?

http://www.kennedydiesel.com/docs/HIGH%20IDLE%20INSTALL%20FINAL.htm
This is exactly what I did. I was already getting into the emc for a new DSP5 switch and it was super easy. I ran the wires like described in the link and wired it to a radio shack switch with "power on led" so I never forgot to turn it off.

I havnt been able to find the spare terminals from this job(I think its somewhere in my back seat and Im gonna clean the truck out this weekend) but worst comes to worse I ordered a pack of 10 from amazon-( http://www.amazon.com/gp/product/B0040CVUX0/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1 ) -Came to like $16 for 10 and im probable never gonna use the rest for a while if ever.
 

MolonLabe420

DirtyMax
Apr 6, 2018
80
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0
SE PA
Has anybody wired in a 6 position DSP5 switch with high idle?

It has 4 wires - Black, Purple, Blue, Pink. Only one labeled is Blue "High Idle".
Instructions say:
Black wire = Blue connector, pin 49
Purple wire = Blue connector, pin 69
AND THATS IT...

Customer service transferred me to 2 people who didn't know, then a guy called me back from a different state and when I explained to him, he didn't know.... one guy said something about the high idle might go in the grey connector or the black connector. Nobody seems to know where this sneaky pink wire came from.
Everything I've read so far is all about pin 71 to the brake wire, but that's just for a simple-wired high idle by itself, correct?
Has anybody had hands on one of these?
 

2004LB7

Well-known member
Dec 15, 2010
6,984
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Norcal
- High Idle is pin 71 on ecm and brake switch terminal F
- DSP5 - ECM Signal = Blue connector pin 69 & ground = blue connector pin 49

Black and purple wire = DSP5
Pink and blue = high idle
 

MolonLabe420

DirtyMax
Apr 6, 2018
80
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0
SE PA
Sooo the blue wire goes in #71 and the pink goes to F on the brake? Pink and blue get twisted together because they're both High Idle? You kind of didn't add any info that wasn't stated lol....
 

darkness

Well-known member
Jul 15, 2009
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Sooo the blue wire goes in #71 and the pink goes to F on the brake? Pink and blue get twisted together because they're both High Idle? You kind of didn't add any info that wasn't stated lol....

Blue goes to #71. Pink goes to 12v+. It’s just easier to use the brake switch so you don’t forget to turn it off and wonder why you can’t rev past 2500 rpms.
 

MolonLabe420

DirtyMax
Apr 6, 2018
80
0
0
SE PA
Blue goes to #71. Pink goes to 12v+. It’s just easier to use the brake switch so you don’t forget to turn it off and wonder why you can’t rev past 2500 rpms.

Thanks. From my research, that seems correct.
I did however, get a call back from anotherrr guy from the company and he said the blue wire goes in the grey connector, pin 6 and the pink wire goes to the black connector, pin 12.... Can anybody confirm what those pins go to, and know if that would work?
Now I'm conflicted..
 

catmenace

Member
Jul 31, 2010
255
2
18
I just did the EFI flash on my BCM and now have the High idle by using my cruise cintrol button. It shows the high Idle on the dash as well. Very Cool!!! I just checked though and does not seem to be available for LB7 trucks.
 
Last edited:

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
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Im pretty sure the only way you could wire in a high idle on an LB7 was thru the cruise buttons. Cant say Ive ever heard of anyone using any other means.