Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

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

Related Medium and Heavy Trucks Questions
2000 freightliner classic fan won't shut off. Put a new temp
2000 freightliner classic fan won't shut off. Put a new temp switch in block new air Solenoid solenoid. We have no power at air solenoid or both low or high a/c switches , but a/ works. All breakers h… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
396 satisfied customers
I am looking to add a manual cooling switch if i understand
I am looking to add a manual cooling switch if i understand right to disengage the fan the ecm send 12v to the fan solenoid is this correct … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
My engine fan will not turn on. Either with the manual
My engine fan will not turn on. Either with the manual switch or just letting the ecm do it by water temp. I've replaced the fan air solenoid and it still will not engage. Unless I cut the wires to th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
2002 379 pete c15 6nz cat .engine will not start without
2002 379 pete c15 6nz cat .engine will not start without either . has new fuel pump new injectors new cam and crank sensors new engine wiring harness new check valves new filter housing, new ecm. Has … read more
Edward Haniewski
Edward Haniewski
General Studies/Automotive
1 satisfied customers
I have the C15 6NZ, my engine fan spin all the time, i
Hi i have the C15 6NZ , my engine fan spin all the time, i change new silinois and new fan clutch still same, no power come out the EGM, also level sendser it not work, engine break not work and cruis… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
2005 Peterbilt 379 ***************** with Cat C15 ACERT.
2005 Peterbilt 379 ***************** with Cat C15 ACERT. Manual fan switch will not turn engine fan on. It did but it quit.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I have a c15 mbn bridge motor, what can I do to get better
Hi I have a c15 mbn bridge motor, what can I do to get better fuel mileage … read more
Kent Van Wagner
Kent Van Wagner
40 satisfied customers
My freightliner Classic with cat 6nz fan won't come on
My freightliner Classic with cat 6nz fan won't come on automatically I have to manually turn on from fan switch on the dashboard … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I have a2008 Kw vin R935150, Allison automatic. The the
I have a2008 Kw vin R935150, Allison automatic. The the engine will not stop running. Recently it had a delete done on it for the emission controls ( causing it nothing but problems ). The thermostat … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have 2 questions, 2002 cat c15 engine fans is staying on,
i have 2 questions, 2002 cat c15 engine fans is staying on, and the wiring diagram for the trans temp gauge has been unhooked and looking for the correct way to hook up the wires again? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Cat man. I have a c15 that will not engage clutch fan when
Hello cat man. I have a c15 that will not engage clutch fan when coolant temp reaches high temp. Fan will come on manually with switch and comes on with a/c. Temps climb to atleast 220. New temp switc… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 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
10,214 satisfied customers
working on c15 e/n mbn 10972 in a 2003 pete and eng cooling
working on c15 e/n mbn 10972 in a 2003 pete and eng cooling fan won come on even at 218. r&r sensor at ther housing. also cant comunacate with ecm… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I am working on a Caterpillar engine, C15 - Sn#6NZ01357. Using
I am working on a Caterpillar engine, C15 - Sn#6NZ01357. Using Cat ET, is there a way to program the temp that the engine cooling fan turns on? Cant get the fan to come on, let the engine get to 215 a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
i have a 2008 peterbilt 388 c15 cat cooling fan does not come
i have a 2008 peterbilt 388 c15 cat cooling fan does not come on with temp or manual switch. there is no power to switch on dash or solenoid under hood.no blown fuses at panel i would like to find out… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I ve been having trouble with the engine staying on when you
I ve been having trouble with the engine staying on when you turn the fan switch to on.when engine dies with the switch still on it will only crank until the switch is off and key off too and then it … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
I am working on a 379 Pete with a c15. The engine fan does
I am working on a 379 Pete with a c15. The engine fan does not engage when the engine temp rises nor does it engage with the override switch. It does cycle when the a/c is on. The cruise control is al… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 satisfied customers
Hi catman, I have read several of your replies and I have a
Hi catman, I have read several of your replies and I have a question for you hopefully you can help. I have a 2006 Peterbilt with a 2008 SDP acert engine. I have swapped everything over to 6nz pre emi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,214 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

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,214 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,740 satisfied customers

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

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

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

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 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