Medium and Heavy Trucks

Have Truck Repair Questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

Medium and Heavy Trucks

2008 Chevy topkick 8.1L. Not not working. I've replaced the…

Customer Question
2008 Chevy topkick 8.1L. Not...
2008 Chevy topkick 8.1L. Not not working. I've replaced the the horn, turn signal assy, and the push section in the middle of the steering wheel. I'm getting no power to the push connector on the steering wheel. Relay has power to 2 post but not clicking over, fuse is good. I can run a jumper to the horn and it works. I've swapped relays with a working relay and still no luck.
Submitted: 1 month ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 10 minutes by:
12/29/2017
Technician: TECHPRO49,
 replied 1 month ago
TECHPRO49
Category: Medium and Heavy Trucks
Satisfied Customers: 2,099
Verified

Hello my name is ***** ***** welcome to just answers! I will be assisting you with all of your vehicle questions today. Give me one moment while I review your question and come back with a answer. Please be aware I do not know your skill level or abilities so I will be asking a lot of questions and in a lot of cases we will respond to each other quite a lot before we find a solution. As far as phone calls are concerned that is the system prompting you, not me, and they do cost more money, I prefer text but in some cases a phone call is required. If I don’t answer right away or quickly in conversation I am helping another customer or have stepped out for a moment and will respond as soon as I can. Ok lets get started!

I might be able to help, do you have a vin number for this? Ill check and see if I have the diagram

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 month ago
My skill level is pretty decent as I do this for a living. Text is fine. Thank you
Technician: TECHPRO49,
 replied 1 month ago

I might be able to help, do you have a vin number for this? Ill check and see if I have the diagram

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 month ago
1GBE4C1GX9F409306
Customer reply replied 1 month ago
I'm heading to go work on the truck now. So hopefully you can reply soon. I'm also a little confused on how the power & grounds work. The hold button has a ground that connects to the column and the other wire is supposed to be a hot wire but it seems like it grounds also? If I apply direct power to red wire on the horn button and press the botton to make the horn work it shorts out.
Technician: TECHPRO49,
 replied 1 month ago

I just looked it up I dont have the diagram for that, this may need to be listed as a med duty truck for you to get the help you need ill send a message to the moderators to see if they can change it

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 month ago
Ok thank you
Technician: tracker40,
 replied 1 month ago
tracker40
Category: Medium and Heavy Trucks
Satisfied Customers: 13,203
Verified

Hello, I was able to pull wiring diagrams for the horn, same as most but I have your truck on my end, I am not 100% sure what you have done at horns swithes etc, possible you can take a picture of the plunger etc on the steering wheel so I can see yours? send picture to this post?

Ask Your Own Medium and Heavy Trucks Question
Technician: tracker40,
 replied 1 month ago

reviewing, bear with me, thanks

Ask Your Own Medium and Heavy Trucks Question
Technician: tracker40,
 replied 1 month ago

can i get a picture of the steering wheel side? thanks

Ask Your Own Medium and Heavy Trucks Question
Technician: tracker40,
 replied 1 month ago

Ok, what I want you to do is this, Unplug the RED spring plunger end from the horn pad. Take the spring plunger end and be sure inserted in the column hole, . I then need you to take the end of the REd wire that came from the horn pad and touch it directly to the nut/shaft for the steering wheel. Does the horn work?

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 month ago
It does not. I have a fleet of these I work on and all the other ones have 12v to the red plunger but this truck does not have any power to the red plumger.
Technician: tracker40,
 replied 1 month ago

Sending answer in few minutes, thanks

Ask Your Own Medium and Heavy Trucks Question
Technician: tracker40,
 replied 1 month ago

I do NOT see how you have 12 volts on the RED wire . Never in all my years ( 36 master tech) working on cars and trucks have I ever seen 12 volts on a horn wire at the switch, This is why you have a relay. The red wire only makes a ground. The ground activates the horn relay and the relay clicks sending power to the horns, NO way for me to say where the problem lies but I am 110% that Red is grounded. It is NOT to have 12 volts. The problem likley is within the column where the wheel is that allows the steering wheel to turn and at same time the horn wires make contact OR a break in the horn wire within the steering column. You need to get the steering wheel back off, You need to inspect the cancel cam, the item with a copper ring on it. I promise the probelm is between the horn pad and base of steering column. I have attached a wiring diagram showing this

System Operation

The vehicle horn system is activated whenever the horn switch is depressed or when the keyless entry system is used to lock the vehicle. A horn chirp may sound to notify the driver that the vehicle has been locked. For further information refer to Keyless Entry System Description and Operation.

Circuit Operation

Battery positive voltage is applied at all times to the horn relay coil and the horn relay switch. Pressing the horn switch applies ground to the horn relay control circuit. When the horn relay control circuit is grounded, the horn relay is energized and battery positive voltage is applied to the horns through the horn control circuit. The horns sounds as long as ground is applied to the horn relay control circuit.

Rate my service by using the stars at the top of the page. Just Answer can only compensate me for my time

and resources after feedback rating thus rating is required . Rating includes any follow-up questions you may have once you leave feedback rating. Free trials and member questions still require a service rating
Thank you so much!Randall

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 1 month ago
Sorry I haven't responded I've been out of work for the holidays. But I'll be back at truck today and will see if that helps me find the problem. Thanks!
Was this answer helpful?
Ask tracker40 Your Own Question
tracker40
tracker40
tracker40
Category: Medium and Heavy Trucks
Satisfied Customers: 13,203
13,203 Satisfied Customers

tracker40 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

2,322 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,247 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,640 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,019 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

1,225 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

813 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 am searching for solutions for my CAT 262B skid steer
Hello. I am searching for solutions for my CAT 262B skid steer which froze up while moving hay bales in the barn. Engine purrs just fine - no load, no hydraulic pump noises,seems electrical but all fu… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
On. 2007 KW W900 C15 acert. Hooked scan tool found out that
Hooked scan tool found out that the engine ecm things the brake is depressed. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,247 satisfied customers
I have a 2002 International 3000 series school bus with
I have a 2002 International 3000 series school bus with hydraulic brakes. The ABS light is on and my scanner will not detect the ABS module … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
Track on my little excavator came off. how do I put it on
track on my little excavator came off. how do I put it on and tighten it … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have an iveco eurocargo 75e65 2007 model. My truck cranks
I have an iveco eurocargo 75e65 2007 model. My truck cranks over very well but will not start either from cold or warm she will start and run if started with easy start however sometimes if i keep fli… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
Oil pressure low at idle 3406e 5ek. Frieghtliner FLD120
Oil pressure low at idle 3406e 5ek JA: What's the make/model/year of your truck? Engine type? Customer: Frieghtliner FLD120 1996 JA: Are you fixing your truck yourself? What have you tried so far? Cus… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,247 satisfied customers
2009 386 with Cummins ISX. Lose throttle and engine light
2009 386 with Cummins ISX. Lose throttle and engine light comes on. Code is throttle position. replaced 2 tps's, both the harnesses to ECM, and the ECM. Added more grounding and cleaned all connection… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
2005 is stop engine light staring on no codes shown that
2005 is stop engine light staring on no codes shown that would cause this … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,640 satisfied customers
I have some problem when I m decelerating. It's freight
I was going downhill and I started hearing some noise under the cab… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Vocational, Technical or Trade School
2,019 satisfied customers
I have 14 liter detroit when I mash the gas pedal shows
I have 14 liter detroit when I mash the gas pedal shows turbo speed sensor active I replace turbo,engine wire harness, ecm,air filter and check turbo charger… read more
Steven Welling
Steven Welling
Triage Tech/Shop Foreman
Associates
7 satisfied customers
Cummins 360 diesel 252 WB: stop engine light keeps coming
cummins 360 diesel 252 WB: stop engine light keeps coming on, then after stopping for 7-10 minutes goes off and we travel a little further until it comes on again. Had diesel diagnostics--no errors or… read more
Steven Welling
Steven Welling
Triage Tech/Shop Foreman
Associates
7 satisfied customers
Jeremy, Further to our dialog earlier this week regarding
Hi Jeremy, Further to our dialog earlier this week regarding the 2006 Mercedes-Benz Actros 2640. I now have a instrument cluster that is semi-working. Now have air pressure in the left hand side of th… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Vocational, Technical or Trade School
2,019 satisfied customers
Will a sdp cam work in a nsx engine. The sdp21493- nsx00930
the sdp21493- nsx00930 will the sdp cam work in the nsx … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,247 satisfied customers
I have a 3406e there seems to be a ticking noise in the top
i have a 3406e there seems to be a ticking noise in the top end of my motor. it is a 1lw motor. It doesnt do it all the time i first noticed it under a load. the other day i let it idle in the yard to… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
4,247 satisfied customers
New holland tc55da 4wd shuttle shift i. d. number z6ncc1176.
new holland tc55da 4wd shuttle shift i. d. number z6ncc1176.*****not engaging. lever on left side is not a definite feel. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
813 satisfied customers
I have a 2006 4200 with vt365 no start with dtc 2023-14p
I have a 2006 4200 with vt365 no start with dtc 2023-14p 150:1 and 612-14p 25:2 any idea where to start at … read more
Alex Olsen
Alex Olsen
auto/diesel/industrial
396 satisfied customers
07 vnl670 w a d12. Getting active: mid 28 pid 27 and 146
07 vnl670 w a d12. Getting active: mid 28 pid 27 and 146 respectively and fmi 3 and 7 respectively. Can you please tell me what they mean? Thanks … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,322 satisfied customers
I have a 2005 Freightliner Columbia with detroit series 60
I have a 2005 Freightliner Columbia with detroit series 60 14.0L … read more
Andy3221
Andy3221
truck /coach technician
Vocational, Technical or Trade Scho
222 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