Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

Have a 1994 Volvo, with DDEC II. I need wiring diagram, and…

Customer Question
Hello Have a 1994 Volvo...
Hello Have a 1994 Volvo, with DDEC II. I need wiring diagram, and any troubleshooting info on jake/cruise you can provide.
Submitted: 4 months ago.Category: Medium and Heavy Trucks
Show More
Show Less
Ask Your Own Medium and Heavy Trucks Question
Answered in 5 hours by:
3/13/2018
Technician: Jeremy, Certified Truck/Bus Technician replied 4 months ago
Jeremy
Jeremy, Certified Truck/Bus Technician
Category: Medium and Heavy Trucks
Satisfied Customers: 3,789
Experience: ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician
Verified

My name is ***** ***** I will assist you with your question today.

I'm an independent contractor and I don't get paid until a rating has been made.

We can go back and forth as needed to help resolve the issue you are having. Follow-ups are free after ratings, so rate with confidence!

Which Volvo series is that? I will see what I have.

_______________________________________________________________________________

You want a 5-star service and I want to provide a 10 star service. Please consider that I don't know your skill level as well as I can't see, touch, smell, hear the vehicle/machine in question. Please provide as much detail as possible and I will provide as much I can back to you.

Once an answer is provided, you should see a rating screen. Please rate my personal service to you. The ratings are my personal feedback, they are not the site feedback.

Please note: The site does the phone call requests, not I. I do not generate the request. Same as the memberships. The only thing I ask for is a positive 5-star rating, when we are finished, for my personal service to you.

Thank you for allowing me to assist you through Just Answer!

Jeremy

Ask Your Own Medium and Heavy Trucks Question
Technician: Jeremy, Certified Truck/Bus Technician replied 4 months ago

CLICK HERE for the DDEC II cruise diagram. This is literally the only one Volvo has. They don't have a pinout at all for the different models as far as the engine goes. i was trying to get the ECM or cab pinout, but it's not available. The DDEC II was horrible on the diagrams they provided for it. It wasn't until DDEC III/IV that there was a real diagram. I do have the DDECC II diagram for the Peterbilt, which used the same wire numbers in the Volvo if that will help you. It is the same as the Detroit one, just ahs a Peterbilt logo on it. They are the only ones that I can recall that had a diagram and that came out around 2011 due to the glider kits they offer.

On diagnosing it, start in the cab. You have the wire 953 that has the constant power to and a black wire that has the ground which goes to the clutch pedal and air brake switch. Verify you have those, then the rest is just making sure you get the jumps on the switches. If you don't have the 2 basic, then you know the issue is either in the power from the fuse or in the ground switches.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
The wire numbers provided, do not match. We were able to get the cruise working by keeping the wires on the 3 wire pressure sensor at the back of the yellow knob dash valve open. Cruise cancels w/ clutch brake, but does not cancel with foot valve.
Please at least provide how the cruise works in relation where the inputs and outputs derive from.
Technician: Jeremy, Certified Truck/Bus Technician replied 4 months ago

I've opted out for a sudden death in the family. I don't want you to be waiting on me for assistance with me unavailable.

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 4 months ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,837
Experience: Owner at DJ Wilson
Verified

Hi ,My name is Dan. I will be glad to help. We can follow up as needed on here, Give me some time to review your information and post my responses. Im not an employee of the site but I help on here as time allows in between jobs. Response time will vary depending on my work load , etc.

Ask Your Own Medium and Heavy Trucks Question
Customer reply replied 4 months ago
I believe we have it figured out, the info I gave last just answer tech was incorrect. Wire numbers match schematic provided, just need more complete schematic. Also want to verify, all cruise function inputs to ecm, and interlocks, incl brake air switches,clutch switch, work switching ground correct? A schematic of entire cruise circuit, including brake air switches and clutch
pedal, and ecm pin outs would be helpful, along with any narrative on how the cruise functions, both stationary idle ramp up and speed control, going down the road.
Technician: Daniel Wilson,
 replied 4 months ago

Click on this link for some other DDEC2 diagrams. They are the same no matter what truck they are in. It only changes after the OEM plug to the chassis per manufacturer.

Service info

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 4 months ago

Click below for the cruise operation. Be sure to use the DDEC2 diagram for testing.

Cruise operation

Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated.

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 3 months ago

Hi, Did you get this resolved? Please take a moment to rate as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated.

Ask Your Own Medium and Heavy Trucks Question
Technician: Daniel Wilson,
 replied 2 months ago

Hi Leo, Did you get this resolved? Please take a moment to rate my answers as that is how the site credits my time helping on the site or let me know if you need more help. 5 star and bonuses are always greatly appreciated. I took the time to help you, can you return the favor?

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 Daniel Wilson Your Own Question
Daniel Wilson
Daniel Wilson
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 6,837
6,837 Satisfied Customers
Experience: Owner at DJ Wilson

Daniel Wilson 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

6,837 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

3,789 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

991 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
Have a 2002 freightliner classic (old style, square nose)
have a 2002 freightliner classic (old style, square nose) with detroit series 60 engine. Cruise control is not working correctly. 1) it won't engage while truck is moving. 2) parked, "cruise" will set… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
I'm having troubles with a 1994 379 peterbilt, when I turn
I'm having troubles with a 1994 379 peterbilt, when I turn the key on, the dash lights come on momentarily as normal. Then they all shut of except for a few, then a relay clicks and the rest shut off,… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
My 2000 Volvo 770 has a Detroit 60 series and it no longer
My 2000 Volvo 770 has a Detroit 60 series and it no longer will idle up, the cruise control isn't working and the engine brake isn't working anymore either. Can you help? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
I have a1991 T800 with a DDec II the jake kills the engine
I have a1991 T800 with a DDec II the jake kills the engine even when you step the clutch or throttles the cruise works… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
We have a DDEC 4 that backfires and coughs when you let up
We have a DDEC 4 that backfires and coughs when you let up on the throttle. Here is what we have done. Three heads, two sets of injectors, new computer, new wiring harness from computer to jakes and i… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
2006 western star 4900fa cruise control and engine brake quit
2006 western star 4900fa cruise control and engine brake quit after truck warms up. both work fine prior to warm up. looking for schematics and or theory of operation. vehicle has new clutch switch, s… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
Need the tune up procedure Freightliner century Detroit
Need the tune up procedure for 2000 Freightliner century Detroit 12.7L 60 series... Which include replacing injectors, ajdusting injectors timing, adjusting intake and exhaust valves. And jake brake..… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
I have a 2007 Freightliner Vin 1FYHA6CKH7LZ43395 that is
Hello, I have a 2007 Freightliner Vin 1FYHA6CKH7LZ43395 that is throwing a code SID 263 FMI 4 Flash Code 31. The scanner description on Snap On Pro Link Ultra is Auxiliary Output No. 15 Short to Groun… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
Throttle not responding on a Series 60. ECM is seeing
Throttle not responding on a Series 60. ECM is seeing Throttle count but not percent accelerator. Data shows vsg set speed even with cruise switch off. Was working fine a couple days ago now nothing. … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
3,789 satisfied customers
Freightliner Century class S/T with N14 Cummins Plus (celect
Freightliner Century class S/T with N14 Cummins Plus (celect plus). Having issues with Engine brake functions. Engine brake does not function in either hi or low mod. It is a single switch set up. I'v… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
2007 peterbilt 379, isx. Question 1, cruise control will not
2007 peterbilt 379, isx. Question 1, cruise control will not switch on. Clutch and brake switches test ok at dealership. Controls are shifter mounted. Suspect broken wire at shifter base. Should i ck … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
3,789 satisfied customers
Wiring diagram to a ddec3 ecm. I don't think that I am
claytonh 729 wiring diagram to a ddec3 ecm. I don't think that I am getting ignition power and want to pin out.… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
I have a problem with my clutch sensor not receiving power
I have a problem with my clutch sensor not receiving power on a 60 series Detroit and a ddec 4 ecm there is no voltage going to the clutch sensor and when hooked to the computer it reads as a constant… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,837 satisfied customers
series 60 ddec 3 need help wiring a jake into ecm. the engine
series 60 ddec 3 need help wiring a jake into ecm. the engine had a functioning jake in original truck, We have put it in a truck that had no jake. can I talk to tech… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
252 satisfied customers
I have a 1994 peterbilt with a 12.7 60 Series engine DDEC II.
I have a 1994 peterbilt with a 12.7 60 Series engine DDEC II. Two nights ago my alternator went out on the truck, it was running until I turned the lights on and tried to get out of a housing subdivis… read more
Dieselman36
Dieselman36
High School or GED
I have a ddec II and the jakes are very weak, Ive installed
I have a ddec II and the jakes are very weak, I've installed a tune up kit but made no differance… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
19 satisfied customers
I have a 1998 T-800 Kenworth with a series 60 Detroit. I had
I have a 1998 T-800 Kenworth with a series 60 Detroit. I had been having issues with TPS (throttle position sensor) where every once in a while the check engine light would come on and a fault would s… read more
Clayton
Clayton
Technician
Vocational, Technical or Trade Scho
633 satisfied customers
I swapped a DDEC 4 out of a peterbilt and put in a DDEC 2 jakes
I swapped a DDEC 4 out of a peterbilt and put in a DDEC 2 jakes on the DDec 2 are different they need to run through a Jake module or something Can you get me a diagram or walk me through what i need … read more
JCTech
JCTech
Technical Specialist
Vocational, Technical or Trade Scho
352 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