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
No cruise on 2005 peterbilt with c15, have et, cruise on/off
no cruise on 2005 peterbilt with c15, have et, cruise on/off works, clutch and brake switch both show off, but on et where it says cruise mode, it says not activated… read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
8 satisfied customers
I'm looking for Cat Man or someone knowledgable in 2007 cat
I'm looking for Cat Man or someone knowledgable in 2007 cat c15 twin turbo engine. Engine fan is not disengaging with key switch on or with engine running. There's no power to selonoid wire from ecm t… read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
8 satisfied customers
I did a engine swap on a 1994 Peterbilt 379 that had a model
I did a engine swap on a 1994 Peterbilt 379 that had a B model cat, I put a 3406e (6ts04777) I'm trying to hook up jakes and cruise but the wiring diagram doesn't explain what's 12volt power and groun… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,307 satisfied customers
1995 peterbilt 379 with a crate engine from 1998, the engine
1995 peterbilt 379 with a crate engine from 1998, the engine dont go on when the ac high pressure is high, also i think that the engine fan dont go on even if the engine ecm is calling for it i did th… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have 1999 peterbilt engine fan wont come on automaticly.
Hi i have 1999 peterbilt engine fan wont come on automaticly … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 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
10,244 satisfied customers
Just installed a new block 6nz and having trouble finding
just installed a new long block 6nz and having trouble finding the location to a plug. im thinking its coolant temp because the ecm is reading 194 degreees coolant temp at all times. … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,307 satisfied customers
I am workn on a 2007 peterbilt 379 with a C-15 NXS. The
Hi my name is Ben.. I am workn on a 2007 peterbilt 379 with a C-15 NXS. The jakes do not work on the high setting. We have tried new engine harness, new spacer plate harness, new cab to engine harness… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
CATMAN cat 3406e 5EK01752 in a peterbilt engine fan will not
CATMAN cat 3406e 5EK01752 in a peterbilt engine fan will not come on when truck is on,,, truck is overheating, with key on the ENGINE FAN light comes on, in the dash panel and I have power to fan sole… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
Working on a 3406e 5ek in 1996 379 pete, eng fan running all
working on a 3406e 5ek in 1996 379 pete, eng fan running all the time, check wiring and fuses and relays all seem to b ok, on the plug that goes on the manual o/r switch in cab all the wires are hot i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
Have a 3406e in my 2000 model 379 and my engine fan comes on
Have a 3406e in my 2000 model 379 and my engine fan comes on and off at highway speed. It's not running hot. I've replaced the fan sensor on fire wall and a/c sensor on side of the radiator. The fan a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
The fan doesnt come on with jakes or when engine temp is hot
the fan doesnt come on with jakes or when engine temp is hot in our 1998 peterbilt 378 with a 3406e … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
Lol m working on a 1998 peterbilt that the speedometer isn't
lol m working on a 1998 peterbilt that the speedometer isn't working. Replaced sensor already. Cat et is not registering any speed either. Possibly wiring between sensor and ecm?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
I have a 2008 peterbilt 389 with a cat 6nz motor. My engine
I have a 2008 peterbilt 389 with a cat 6nz motor. My engine fan keeps turning on every 10 min and staying on for 5-10 min at a time. Coolant temperature is fine. Any idea what could be causing this?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e 40 pin. What do I need for the cab. I have the harness from the ecm to the firewall from a donor truck. … 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
10,244 satisfied customers
1996 Kenworth W900 Fan clutch Problem the high pressure
1996 Kenworth W900 Fan clutch Problem the high pressure switch for my ac is not making the fan clutch come on and the Temp coolant sensor when it gets to 210 or even till 220 fan clutch also does not … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,244 satisfied customers
1997 357 ecm won't turn the fan on but manual switch will.i
1997 357 ecm won't turn the fan on but manual switch will.i go into et and i can make it active and inactive but air solenoid doesn't get the signal.thinking there must be a relay some where.any thoug… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 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

10,244 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