Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

I have a brake booster light that comes on while driving,

Customer Question
I have a brake...

I have a brake booster light that comes on while driving, 2014 Isuzu npr

Mechanic's Assistant: Have you checked the brake fluid? How's the level and when was it last changed?

Level looks good,. have no idea when it was changed if ever, vehicle has 65k miles on it

Mechanic's Assistant: What is the model of your '14 Isuzu?

NPR

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

Checked the brakes, plenty of brake pad and brake shoe, no hydraulic leaks

Submitted: 11 months ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 13 hours by:
8/2/2017
Technician: Andy, Truck Diagnostic Technician replied 11 months ago
Andy
Andy, Truck Diagnostic Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1,978
Experience: International and Isuzu trucks , International, Maxxforce, Cummins and Isuzu engines, Diagnostic and electrical troubleshooting specialist , Hvac and truck /trailer refrigeration troubleshooter
Verified
Hi there . My name is ***** ***** I will look this up for you later today if that's ok ? What size of engine do you have ?
Ask Your Own Medium and Heavy Trucks Question
Technician: Andy, Truck Diagnostic Technician replied 11 months ago

Do you still need help ?

Ask Your Own Medium and Heavy Trucks Question
Technician: Andy, Truck Diagnostic Technician replied 11 months ago

Do you still need help with this ?

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 Andy Your Own Question
Andy
Andy
Andy, Truck Diagnostic Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 1,978
1,978 Satisfied Customers
Experience: International and Isuzu trucks , International, Maxxforce, Cummins and Isuzu engines, Diagnostic and electrical troubleshooting specialist , Hvac and truck /trailer refrigeration troubleshooter

Andy is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

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

2,775 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,493 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,869 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,235 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

cumminsdr

cumminsdr

Mechanic

1,337 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

961 satisfied customers

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

dieseldan55

dieseldan55

Contractor

74 satisfied customers

Road Service mechanic for Volvo Construction.

< Previous | Next >

Related Medium and Heavy Trucks Questions
I have a 2007 Isuzu NQR and my coworker was driving the
I have a 2007 Isuzu NQR and my coworker was driving the truck. he told me that the brakes went to the floor while driving and the steering became difficult. now the power steering reservoir is over fl… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,869 satisfied customers
2007 isuzu nqr is leaking from power steering reservoir and
2007 isuzu nqr is leaking from power steering reservoir and is getting empty on the brake system reservoir, they change the pump with 4 lines and works fine for 2 weeks then start leaking from power s… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,775 satisfied customers
I have a 2008 diesel Isuzu NPR. The car got under 3 feet of
hi, I have a 2008 diesel Isuzu NPR. The car got under 3 feet of water last week. I checked the engine oil and transmission oil and it didn't get any water. I also checked the air filter and replaced i… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,869 satisfied customers
Do you think a 2011 Isuzu NPR HD with 279,000 ,500 is
Do you think a 2011 Isuzu NPR HD with 279,000 for 9,500 is a good deal? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,775 satisfied customers
1999 Isuzu npr with soft brake pedal... Mechanic replaced
1999 Isuzu npr with soft brake pedal... Mechanic replaced master cylinder. Week later soft pedal and air in front calipers. No signs of leaks or brake fluid anywhere. Plenty of fluid in reservoir. Rep… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,869 satisfied customers
I have a 2001 Isuzu NQR, I replaced all 4 rear wheel
I have a 2001 Isuzu NQR, I replaced all 4 rear wheel cylinders, shoes and drums. bled the system several times now. Bled out the load proportion valve also. When I hit the brakes hard once they work, … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,235 satisfied customers
1999 Isuzu NPR Diesel 4.8 brake issue vacume light comming
1999 Isuzu NPR Diesel 4.8 brake issue vacume light comming on and spongy brakes. Has new drums shoes, used booster, new master cylinder. Changed bypass valve. pumped and removed air r/r left front the… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,235 satisfied customers
1999 ISUZU NPR 4.8 DIESEL BRAKES FEEL SOFT, IF PUMP TO MUCH
1999 ISUZU NPR 4.8 DIESEL BRAKES FEEL SOFT, IF PUMP TO MUCH BOOST LIGHT COMES ON. HAS GOOD BOST PRESS. AND NEW BRAKE AND MASTER CYLINDER, I DO NOT SEEM TO BE GETTING ANY AIR OUT OF THE BLEEDERS, THE V… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,869 satisfied customers
I have a 2001 International 4300 with hydraulic brakes.
I have a 2001 International 4300 with hydraulic brakes. Brake pedal is very hard for first 1" than it pushes in smooth like normal. No lights on in dash. Brake fluid is ok. Found pressure line cross t… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,235 satisfied customers
I have a 2006 Isuzu NPR Diesel Truck and I just got a Brake
I have a 2006 Isuzu NPR Diesel Truck and I just got a Brake Booster light on my truck and I have no brake pedal as my brake goes to the floor now.… read more
Peter Zavarelli
Peter Zavarelli
Automotive Diagnostic Specialist
General auto certifications
415 satisfied customers
2006 ISUZU NPR. RECENT REPLACED FRONT PADS , TURNED ROTORS
2006 ISUZU DIESEL NPR. RECENT REPLACED FRONT PADS , TURNED ROTORS , AND REPLACED THE BRAKE BOOSTER, DUE TO BRAKE BOOSTER WARNING LIGHT ON DASH. TEST DROVE TRUCK AND EVERYTHING SEEMED NORMAL. LESS THAN… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,869 satisfied customers
I HAVE A 2005 ISUZU NPR BOX TRUCK . I RECENTLY REPLACED FRONT
I HAVE A 2005 ISUZU NPR BOX TRUCK . I RECENTLY REPLACED FRONT PADS , TURNED ROTORS , AND REPLACED THE BRAKE BOOSTER .I GREASED THE SLIDES DURING REASSEMBLY . I TEST DROVE TRUCK AND EVERYTHING SEEMED N… read more
ASETECH2073
ASETECH2073
Branch Manager
Master\u0027s Degree
8 satisfied customers
i have a 2002 isuzu npr diesel the brake booster light comes
i have a 2002 isuzu npr diesel the brake booster light comes on and the alarm sounds off the brakes are real hard there is also a 30 amp fuse that blown i replace it with a 30 amp fuse its not the ori… read more
Peter Zavarelli
Peter Zavarelli
Automotive Diagnostic Specialist
General auto certifications
415 satisfied customers
1995 isuzu npr 3.9 diesel I am getting a hard brake pedal
1995 isuzu npr 3.9 diesel I am getting a hard brake pedal and then sometimes spongy. Rear brake shoes, wheel cylinders, and drums are new. The Vacuum light turns on every morning and through out the d… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
I have a 2001 Isuzu NPR W4500. I cant find anything on the
I have a 2001 Isuzu NPR W4500. I can't find anything on the repair manual on how to adjust the emergency or parking brake.… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,235 satisfied customers
I have a 1986 f700 dump, When its cold Not Freezing My brakes
I have a 1986 f700 dump, When its cold Not Freezing My brakes dont work , pushed them hard and could not stop, when i did get stopped i pumped them probly 25 times no more trouble the rest of the day.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,869 satisfied customers
2004 NPR- when coming to a stop on deceleration - as soon as
2004 NPR- when coming to a stop on deceleration - as soon as foot is off the gas and before touching the brake pedal a rubbing/slight grind like a brake noise is heard. If you lightly touch the gas pe… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
I just bought a 2000 international 4700 that has its abs light
I just bought a 2000 international 4700 that has it's abs light on. But thats not the big problem. It has no parking brake. It went to the dealership before I purchased it and they said the master cyl… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
130 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.

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