Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

I have a 1950 8n. just installed a new wiring harness. rus…

Customer Question
I have a 1950...

I have a 1950 8n. just installed a new wiring harness. rus fine

Mechanic's Assistant: What is the complete model and serial number of your machine?

Every thing good, except will not shut off with the key. don't have serial number

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

Jumber wire from coil to frame shuts it down, if I leave jumper hooked to frame it wont start

Submitted: 1 year ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 17 minutes by:
7/28/2017
Technician: Curtis B., Technician replied 1 year ago
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 31,895
Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.
Verified

Are you using the old 6 volt battery and components, or has to been upgraded to 12 volt system? See diagrams below. You have to kill voltage to the coil, to kill engine.

Ask Your Own Medium and Heavy Trucks Question
Technician: Curtis B., Technician replied 1 year ago
Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
old 6v system
Technician: Curtis B., Technician replied 1 year ago

The off/on switch should be breaking the voltage to the coil, is the off/on switch working?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
the amp gage goes back to center
Technician: Curtis B., Technician replied 1 year ago

But is the voltage still to coil?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Already paid $58 not paying $26 for. Phone
Technician: Curtis B., Technician replied 1 year ago

We do't need call, we can work from here.

Ask Your Own Medium and Heavy Trucks Question
Technician: Curtis B., Technician replied 1 year ago

Yes, you still have voltage? Where is power coming from, if switch is working?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
That's my dilemma
Technician: Curtis B., Technician replied 1 year ago

It is a single wire, where does it come from? What else is wired to the coil side of switch?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Red wire goes from coil to terminal block other goes to distributer
Technician: Curtis B., Technician replied 1 year ago

Where is terminal block wired to?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
The regulator and key
Technician: Curtis B., Technician replied 1 year ago

You are not killing power to the coil, it should be wired direct to the on/off keyswitch. I'm not sure you have it wired, but it does not kill voltage to the coil.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Thanks
Technician: Curtis B., Technician replied 1 year ago

Thank you. Please rate to close the question and get me credit.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 year ago
Did the best he could without seeing it
Technician: Curtis B., Technician replied 1 year ago

Did you see the wiring diagrams on the site link I sent?

Ask Your Own Medium and Heavy Trucks Question
Technician: Curtis B., Technician replied 1 year ago
Ask Your Own Medium and Heavy Trucks Question
Technician: Curtis B., Technician replied 1 year ago

I need a posiitve rating on the 5 star rating system on your side, to get credit for answer.

Ask Your Own Medium and Heavy Trucks Question
Technician: Curtis B., Technician replied 1 year ago

I see question is still open, please use the 5 star rating system to close the question and get me credit! Thanks!

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 Curtis B. Your Own Question
Curtis B.
Curtis B.
Curtis B., Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 31,895
31,895 Satisfied Customers
Experience: Technician turned service manager on multiple lines of trucks and engines, used in industry.

Curtis B. 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

2,803 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,530 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,892 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,243 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

1,351 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

31,895 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
Abs light on dash, the display says no abs but when i push
abs light on dash , the display says no abs but when i push the tractor brake valve the light goes off, is there still a system problem even though there are no codes, when hooked up to scan tool it s… read more
roy
roy
Associate Degree
3 satisfied customers
Have a C13, trucks idles and runs fine for a few minutes
Have a C13 , trucks idles and runs fine for a few minutes than begins to miss and shut down. Let it set a few minutes fires right up , but after a few times it wont start . Computer then shows all 6 i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
My cat 287b was running, died and then the starter engaged.
My cat 287b was running, died and then the starter engaged. Now the startery engages as soon as the key is turned on … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,287 satisfied customers
My tractor runs for about 3-4 minutes then shuts down, it's
my tractor runs for about 3-4 minutes then shuts down, it's had the eletrical system converted to a HEI 12 volt system. why is this happening? … read more
Curtis B.
Curtis B.
Technician
Associate Degree
31,895 satisfied customers
Working on a 2009 sterling CNG intermittently won't start
Working on a 2009 sterling CNG intermittently won't start sometimes shuts off won't restart. New purchase no history available. Loosing spark code spn 0725 FMI 4. Red stop on the dash.… read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
11 satisfied customers
Would like to ask a question regarding to a Outlet Nox
Would like to ask a question regarding to a Outlet Nox Sensor fuse went out 20 times in a trip. I have looked at the Wiring Diagram that is how we found out it was the fuse but after replacing problem… read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I have a mec 2548HT sicessor lift that every thing works
I have a mec 2548HT sicessor lift that every thing works fine except it will not move in reverse, fine for word. Your help be greatly appreciated … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
I'm having many problems at once. However the most pressing
I'm having many problems at once. However the most pressing at the moment is no power to the ac controls. … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 satisfied customers
I HAVE A 08 NEW HOLLAND L185 THAT WILL NOT CRANK, THE
I HAVE A 08 NEW HOLLAND L185 THAT WILL NOT CRANK, THE STARTER JUST CLUNKS AND WONT TURN OVER. THE ENGINE TURN FREE WITH A SOCKET ON THE CRANKSHAFT BOLT. NEW BATTERY DID NOT HELP, THE OLD BATTREY WAS W… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
How is the fuel shut off solenoid on a mustang skid steer
how is the fuel shut off solenoid on a mustang skid steer wired I have one that has been mutilated … read more
Curtis B.
Curtis B.
Technician
Associate Degree
31,895 satisfied customers
We have a komatsu WA 250-3MC, Serial # 69148 that has an
we have a komatsu WA 250-3MC, Serial # 69148 that has an issue where the loader will start and run for approx 1 second and then the fuel shut off solenoid kicks in and shuts the motor down. Loader runs fine if you wire back the fuel shut off lever. No codes seem to be showing on the dash. What give the signal to the shut off solenoid? … read more
Curtis B.
Curtis B.
Technician
Associate Degree
31,895 satisfied customers
Well I have a 1999 komatsu pc 150 lc-6 and it wont start.
well I have a 1999 komatsu pc 150 lc-6 and it wont start. the ignition will turn on but it wont turn over. I have gotten it started by using a jumper from the positive on the starter to the start lug … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
We have 2007 7600 international ism cummins 385v cranks wont
we have 2007 7600 international ism cummins 385v cranks wont start no power to fuel shut off, will start if powered. power divider and diff lights flashing on switchs on dash … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,351 satisfied customers
Deer 328d park brake wont release, brake engages machine
brake engages machine starts but brake wont release so no movement and no boom movement … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
I have a 99 western star w/ a 3406 e cat. It started shutting
I have a 99 western star w/ a 3406 e cat. It started shutting off usually while idling, however recently it will shut down while driving, sometimes it will start by turning the key off and back on and… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,530 satisfied customers
Good morning. We have a 2010 vln 780 with a 400 cummins. We
Good morning. We have a 2010 vln 780 with a 400 cummins. We bought the tractor new. It is a team truck. Husband and wife. The tractor has a little over 900,000 miles. We put every mile on it except fo… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
06 international isx, cranks wont start, gauges cycle then
06 international isx, cranks wont start, gauges cycle then they max out like it is shorted out some where, fuses good, power to ecm, not to lift pump… read more
Travis A. Wells
Travis A. Wells
Truck Mechanic
Associates of Applied Science
4 satisfied customers
Chevrolet p30: i need the wiring diagram for a 1989 chevy box
i need the wiring diagram for a 1989 chevy box truck/ van i be leave its a p30 with a lift gate i need the wiring diagram for the lift gate… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 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