Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

This answer was rated:

Mbn cat in a Kenworth just shut down I'm going down the road…

mbn cat in a Kenworth...
mbn cat in a Kenworth just shut down I'm going down the road and it just shut down the speedometer and the tach quit working the engine light does not come on all the rest of the lights come on with the key it will turn over it has fuel and the ABS light is on
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 2 minutes by:
2/9/2017
Technician: Cat Man, Cat Engine Expert replied 5 years ago
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Thanks for asking your question. I will try and help you out.

If the yellow check engine light does not come on when the key is turned to the on position and the engine will not start, there are only 2 things that can cause this.

The first and most common is the engine ECM is not getting the correct power and ground to function. The ECM should have power on pins 52, 53, and 70 of the rear most ECM connector. This is the truck side harness connector. 70 is the key switch wire. The grounds are on pins 65 and 67. You can remove the connector and check for power on these pins. If you do not have power on these pins, you most likely have a blown fuse in the electrical system. I would check all fuses first.

If you do have correct power and ground to the ECM, you most likely have a failed ECM. I have seen this many times over the years. To confirm the ECM is bad, you would need to install a known good ECM on the engine or you can take the ECM to the dealer to be tested. Unfortunately the ECM cannot be repaired. Replacement is the only option. I am sorry. I wish I had better news.

Please reply back if you need more help or have more questions. I am happy to assist.
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
Experience: I am ASE Master Truck Certified.
Verified
Cat Man and 87 other Medium and Heavy Trucks Specialists are ready to help you
Ask your own question now
Customer reply replied 5 years ago
Would it be in the battery fuse the ignition fuse the accessory fuse the ignition bus relayCall would be nice 6184724478OK if I am only getting power to part of my ignition fuses getting 4.5 volts to the engine RTD ignition fuse but I don't know what that is
Technician: Cat Man, Cat Engine Expert replied 5 years ago
Phone call session started
Customer reply replied 5 years ago
Will not let me sen d
Technician: Cat Man, Cat Engine Expert replied 5 years ago
I see. Not sure if pics can be uploaded from phone.
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 5 years ago
Broken power line from the battery to the ECM fuses
Technician: Cat Man, Cat Engine Expert replied 5 years ago
Thanks for the update. I'm glad you got it fixed. Good job.
Ask Your Own Medium and Heavy Trucks Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Cat Man Your Own Question
Cat Man
Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 10,344
10,344 Satisfied Customers
Experience: I am ASE Master Truck Certified.

Cat Man is online now

Related Medium and Heavy Trucks Questions
I'm having weird issues, truck will shut off while driving,
Hi! I'm having weird issues, truck will shut off while driving, only for 2 seconds or so, I'm thinking ecm wiring, do you have a diagram? 2ws cat motor. Thanks! … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
57 satisfied customers
I have a C15 that will not start. I've used a little ether
I have a C15 that will not start. I've used a little ether and it starts but dies immediately due to lack of fuel. I've tried connecting my diagnostic equipment to it and ecm will not communicate with… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
57 satisfied customers
I have a Kenworth T660 with ISX 900 that keeps shutting off.
I have a Kenworth T660 with ISX 900 that keeps shutting off. After a violent steering tire blow out. … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
57 satisfied customers
06 kenworth c15 cat. Quit going down the road. Will start
06 kenworth c15 cat. Quit going down the road. Will start with a sniff of starting fluid but blows grey smoke if you try to give it any throttle and smells like raw fuel. Have done the normal sensors … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
J just bought a used 07 kenworth t600 with a c15 cat.. the
Hello j just bought a used 07 kenworth t600 with a c15 cat.. the truck ran great when i went to pick it up empty. I hooked up the trailer and the abs light came on and I could not go over 1500 rpm and… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have 2003 kenworth t300 with cat 3126 will not start was
Good morning I have 2003 kenworth t300 with cat 3126 will not start was running just died no voltage at heui pump tach inop no codes … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 3176 in a 94' Kenworth SN#9ck31474. I died when I
I have a 3176 in a 94' Kenworth SN#9ck31474. I died when I was warming it up. It slowly ran down like it ran out of fuel. I replaced the water separator and the fuel filter and drained the fuel out of… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a Kenworth dump truck that has a CAT 3176, engine
I have a Kenworth dump truck that has a CAT 3176, engine number, 2YG09791. Won't start - had all fuel lines replaced along with priming pump. Getting fuel to injector bar but will not start. Independe… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Small yellow light on dash above tach to right looks like
small yellow light on dash above tach to right looks like small end wrench. 2007 t800 kenworth with cat c15. attention buzzer rings all the time. not check engine light and no codes. what does light i… read more
Eddy
Eddy
HD Truck Tech
GED
2 satisfied customers
I own a 2005 Western Star log truck with a CAT 550 twin
I own a 2005 Western Star log truck with a CAT 550 twin turbo motor, my truck will just shut off as I'm going down the road, seems to be getting worse, now it takes longer to restart and it is happeni… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2004 Kenworth T 800 with a Catapillar C 15 that was
Hi I have a 2004 Kenworth T 800 with a Catapillar C 15 that was recently just rebuilt about 1000 miles ago that fixed the major issues that we we're having. But we're still having an underlying issue … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a c15 2007 same deal fuel delivery is good will crank
Have a c15 2007 same deal fuel delivery is good will crank over just will not fire up owner drove truck to location shut it off did his farming and truck will not crank up now… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2003 Pete with a C-15 that the ecm ESN doesn't
I have a 2003 Pete with a C-15 that the ecm ESN doesn't match the stamp on the engine. How do i go about changing this? ecm ESN- MBN05367 engine ESN-6NZ20374. I would also like to know the max HP/ tor… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
MY 2000 379 PETERBILT QUIT RUNNING GOING DOWN THE ROAD. IT
MY 2000 379 PETERBILT QUIT RUNNING GOING DOWN THE ROAD. IT HAS A C-15 Catapiller motor which has A million miles on it.I think it is electrical because the speedometer and tach quit working as I coast… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
We have a 2000 Kenworth T2000 with a Cat engine. It shut down
We have a 2000 Kenworth T2000 with a Cat engine. It shut down and won't start. We have troubleshot every mechanical thing possible. Finally came to believe that it was a computer shut down of some kin… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
the kenworth has frozen, yes frozen in the lines 2 times now
the kenworth has frozen, yes frozen in the lines 2 times now first time was in the fuel tank and now today the lines are froze.. we have 3 new ones and all are down what is causing this problem… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
Western Star 3406E Cat motor;;; Truck will just shut down,
Western Star 3406E Cat motor;;; Truck will just shut down, you can turn key on but none of the gauges move and like the truck has no batteries. usually after a few min you can turn the key and gauges … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I HAVE A 2008 T300 WITH ONLY A LITTLE OVER 7,000 MILES AND
I HAVE A 2008 T300 WITH ONLY A LITTLE OVER 7,000 MILES AND THE SPEEDOMETER SUDDENLY STARTED TO BE VERY ERRATIC AND THEN JUST SETTLE DOWN TO ABOUT 10 MPH REGARDLESS OF HOW FAST THE UNIT IS MOVING, BUT … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,344 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x