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Old 01-09-2019, 01:26 PM   #1
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How to enable/turn on cruise control

I have an Amtran 2002 t444e and it has the cruise control switches etc but they donít do anything. Iím pretty sure that the cruise is probably just disabled which Iíve heard is common for school buses.

Can I turn it on with a cable and software or something myself? If so what cable/software do I need?

Or should I just take it to a dealership? If itís not too expensive or difficult Iíd prefer to do it myself...
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Old 01-09-2019, 02:11 PM   #2
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Likely need a vacuum source for that to work. Any pics of the unit installed?


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Old 01-09-2019, 02:28 PM   #3
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I am pretty sure that the cruise control on the T444e is all computer. No vacuum source.

AFIK: It is an ECM programming option.
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Old 01-09-2019, 02:51 PM   #4
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My Cruise control button was set for RPM to warm the engine in the winter - it was computer switched by the fabulous CadillacKid Christopher. It will work as is for a steady RPM.
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Old 01-09-2019, 03:15 PM   #5
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If you are near NE Ohio or NE Pennsylvania, I can enable it also.
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Old 01-09-2019, 03:35 PM   #6
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yeppers the others have it right, its an option most often disabled by the schools and easy to turn on... post where you sre at, there may be a fellow skoolie with the compouter interface nearby.. navistar gives away the Level 1 version of the software (servicemaxx J170 which you can enable it yourself, however you need the RP1210 interface box which is not cheap (even the knock-offs)..



finding someone to turn it on for you is likely the easiest for you unless you want to own the scan tools for future diagnosis and such
-Christopher
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Old 01-09-2019, 03:37 PM   #7
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My cruise control works fantastically, but the hi idle button does nothing.
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Old 01-09-2019, 03:53 PM   #8
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marc, turn your cruise control main switch to ON , then try revving the engine with the pedal in neutral to where you want, then press 'SET' or you can hold down the resume / accel and it should slowly speed up the engine.

-Christopher
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Old 01-09-2019, 03:55 PM   #9
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marc, turn your cruise control main switch to ON , then try revving the engine with the pedal in neutral to where you want, then press 'SET' or you can hold down the resume / accel and it should slowly speed up the engine.

-Christopher
When I get it running I'll give that a try. Makes sense, though I thought it had a set high idle speed. Thanks
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Old 01-09-2019, 03:57 PM   #10
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the cummins have a set high idle, most of the Navistars you can adjust as desired...



or you can enable the CAP which is an auto high idle adjust.. thats what I run on mine.. it idles itself up and down to maintain a coolant temp of 165-170


-Christopher
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Old 01-09-2019, 04:01 PM   #11
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Brake Switch

The problems Ive seen with cruise have also been faulty brake switches, just an fyi
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Old 01-09-2019, 04:03 PM   #12
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faulty brake switch code on the navistar will also shut down the high idle feature, as well as a vehicle speed sensor code (breaks cruise and high idle)
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Old 01-09-2019, 08:13 PM   #13
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Thanks for all the replies!

Iím in southeastern Virginia. (Portsmouth)

My ABS light is on and it displays associated codes indicating the ABS is not working. I havenít gotten the idle up function to work.. so I might have to fix the brakes....
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Old 01-09-2019, 09:16 PM   #14
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Anyone know how to get cruise control on my 99 Thomas w/3126? Do those scanners come with any cat software?
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Old 01-09-2019, 09:59 PM   #15
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A lot of the mainstream scanners do not come with engine specific software. They come with generic software which will basically read and clear codes. Each specific software for specific engines, brake systems, and/or transmissions can be added for a charge. Our shop has the International program, Wabco ABS, Allison transmission, and Paccar software since these are what we work on most.
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Old 01-10-2019, 07:34 AM   #16
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my Navistar software supports some CATs although looks like just the newer stuff, not sure if it would detect your engine or not, it might.. some navistar class 8 stuff got CAT engines later on so im guessing thats why they are in there..

-Christopher
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Old 01-10-2019, 09:00 AM   #17
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I've thought about buying one of those chinese nexiq clones that come with a bunch of "trial" software, but now that i've got a mechanical cummins it fell off my list. I'd more or less expect those toggles to be available for each brand but that's just a guess.

Example: https://www.ebay.com/itm/NEXIQ2-USB-...mPEw:rk:3:pf:0
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Old 01-10-2019, 09:09 AM   #18
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I've thought about buying one of those chinese nexiq clones that come with a bunch of "trial" software, but now that i've got a mechanical cummins it fell off my list. I'd more or less expect those toggles to be available for each brand but that's just a guess.

Example: https://www.ebay.com/itm/NEXIQ2-USB-...mPEw:rk:3:pf:0
I thought some of them came with some software. Thanks!
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Old 01-10-2019, 09:12 AM   #19
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Probably all old versions but shouldn't matter much for skoolie folks. More concerned about virus checking them, I'd run in a virtual machine for sure.
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Old 01-10-2019, 09:19 AM   #20
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Probably all old versions but shouldn't matter much for skoolie folks. More concerned about virus checking them, I'd run in a virtual machine for sure.
Yea, IDK what that is... Stuff like that is why computer controlled stuff scares me.
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