Adding Cruise Control to C7

[wehring]

OK folks... here is a bone. This cost me a shiny nickle but for the greater good of the sport you get this for free. Here is a diagram for adding cruise control to the C7 powered trucks.

Justin Wehring
979 997 3112

 

[NDT]

Where is the connection to the brake light switch? Shouldn't the cruise disengage when you hit the brake? Otherwise thanks for the info!

 

[wehring]

Crimper part number is 1U-5804 and it is $400

NDT,
Don't know about the BLS activation. Crimper and connectors arrive Mon. Will mount switches and run wires then call the Cat tech out to program the cruise. Will know more after he makes the visit.

Justin

 

[ramdough]

Any update?


Sent from my iPad using Tapatalk

 

[snowtrac nome]

its all inside the ecm there is a brake input for the ecm and transmission operation no need for external wires. for speed sensor or brakes. also the cruise will also become an electronic hand throttle to idle the truck up.

 

[Keith Knight]

I just did this on my CAT 3126 last year and I did wire it up to a brake light switch.
If the ECM has a brake input I never came across it doing all of my research and it would Not turn off the cruise when I hit the brakes prior to hooking up to the brake light switch. Also here is a ”Warning” the fact that it’s connected to a brake light switch it also will not work if you don’t have your service lights or stop lights on. And the pin for the ecm are like a $1 each from cat and you don’t need a $400 crimp tool if you now how to solder.

 

[snowtrac nome]

I should qualify this as I'm going off how our kenworths are I think the newer c7 lmtv's also use the usb system. I know for a fact your older 3126 has an ecm and tcm that really don't talk to each other. The military may have opted out of some of the safeties that the civilian market has installed in the programing. on our civilian market the trans wont shift to gear if the brake isn't applied park break released and air pressure is up. my 95 doesn't care I can select a gear than release the parking brake and go.

 

[coachgeo]

I should qualify this as I'm going off how our kenworths are I think the newer c7 lmtv's also use the usb system. I know for a fact your older 3126 has an ecm and tcm that really don't talk to each other. The military may have opted out of some of the safeties that the civilian market has installed in the programing. on our civilian market the trans wont shift to gear if the brake isn't applied park break released and air pressure is up. my 95 doesn't care I can select a gear than release the parking brake and go.

95 would be a 3116 thus no engine computer?? granted you know your stuff more than most..... so is yours one with an upfitted engine.... or that a miss type? More than likely am misreading what you typed lol. My 96 (non ecm) pretty sure won't let it engage gear if air pressure is not up. If it is up.... will allow put in gear even if neither brake applied .... if one is applied; brake just stops it from moving.

 

[deshet]

Did the cruise control setup work? What was your total costs? Can somethings be pulled from a Cat truck?
I messed around with low speed cruise with the handle throttle but would not use that at high speed.

Thanks

 

[snowtrac nome]

no not a misprint on the commercial trucks they are loaded with safety's and imput's the Allison computer wont let you select a gear until air pressure is built up parking brake is released engine speed is at idle and your brake is on. only than you can select a gear. my 95 I can slap it in gear than release the brake. its just me but I hate stepping on the brake pedal to go into gear.

 

[Keith Knight]

My cruise works perfectly and make long distance travel a pleasure. Along with the hi speed gears, AC, and tinted widows.
My cost because I do all the research and work is minimal. ECM pins $19, ECM diagram and pin locations free with lots of research, wire from ECM to dash shielded 18 gauge 6 conductor with a couple left over wires $10, cruise on off switch and cruise set / resume switch $70(very hard to find the ones that match but any switches could work), CAT programming $100-500, I group a lot of profaning into one trip. Which included a new ECM, turning cruise options on, change speedometer ratio for new gears so the speedometer shows proper speed, increased HP from 275 to 330. My total for that CAT bill was way more primarily because of new ECM.

 

[deshet]

I still can't lift my cab.
My truck was built in 1998 and rebuilt in 2006.
During the rebuild process is it standard to keep the same engine model and is the cruise control straight forward for all of these?

My trucks gets to 58-62 on the phone gps...only 55 on the gauge but it takes a lot of effort to keep the pedal mashed.

Thanks

 

[Berend]

Thanks for the posting , I will be adding Cruise Control to My C7 & 3126 also.

 

[Ohiobenz]

So can cruise be added to the A0 3116?

 

[coachgeo]

So can cruise be added to the A0 3116?

appears there is two main options in the aftermarket made to fit the CAT.. Some at auction sites that are more universal and mention mechanical diesels. Kruisecontrolking seems to get the most mentions to handle the stiff throttle and vibrations... but it better for the cost.... up to 600 bucks for kit. others are significantly less....

http://www.cruisecontrolking.com/

 

[Berend]

I'm working on buttons mounted on the steering wheel. I found a good solution that can easily be mounted on the steering wheel. The steering wheel buttons send the inputs wireless to a receiver. The receiver sends the commands to the ECM. ( Same as a swich would do it ). I'm working on a module now that converts the inputs of the receiver to commands that can be send to the ECM. This requires designing a PCB and programming a micro-controller. Fun stuff to do. If anybody is interested in this let me know.

 

[Berend]

 

[Dave21]

[FONT=&quot]I have a 2007 M1078 A1R with a cat C7. I haven't taking off the harness side connector yet . I'm adding a picture of the connector. I have been told this the right connector layout .[/FONT]
[FONT=&quot] if you could let me know if this is correct I'd appreciate it and if not could you give me the layout of the connector that you use .[/FONT]
[FONT=&quot] Thanks[/FONT]
[FONT=&quot] Dave V[/FONT]

 

[coachgeo]

I have a 2007 M1078 A1R with a cat C7. I haven't taking off the harness side connector yet . I'm adding a picture of the connector. I have been told this the right connector layout .
if you could let me know if this is correct I'd appreciate it and if not could you give me the layout of the connector that you use .
Thanks
Dave V

No picture came thru

 

[scottmandu]

Did the cruise control setup work? What was your total costs? Can somethings be pulled from a Cat truck?
I messed around with low speed cruise with the handle throttle but would not use that at high speed.
Thanks

If you have a hand throttle you do not have a C7 and cannot use this method to add cruise.