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Related Medium and Heavy Trucks Questions
I got a 2000 Peterbilt 379 speedometer stopped working We
I got a 2000 Peterbilt 379 speedometer stopped working We replaced the speedometer and speed sensor on trans … read more
Mikael
Mikael
Bachelor's Degree
150 satisfied customers
My 1999 379 peterbilt speed meter don't work I replaced the
My 1999 379 peterbilt speed meter don't work I replaced the speed sensor and my speedometer gauge is good … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 98 379 that the fan wont kick on after an inframe
I have a 98 379 that the fan wont kick on after an inframe new water pump, thermostats, new sensors. On the computer it says fan is constantly on … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I don't have voltage going to the solenoid. 2002 Peterbilt
Yes working on it myself,I just installed new solenoid, no voltage going to the solenoid … read more
Andy
Andy
Truck Diagnostic Technician
Vocational, Technical or Trade School
2,779 satisfied customers
Cruise won't kick off with brake lights. clutch switch will
cruise won't kick off with brake lights. clutch switch will turn it off. engine brake will not work with cruise switch in on position. … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
1995 Peterbilt n14 Cummins the speedometer quit put new
1995 Peterbilt n14 Cummins the speedometer quit put new sensor and gauge in still not reading checked wires and all ohm out any solution? … read more
Andy
Andy
Truck Diagnostic Technician
Vocational, Technical or Trade School
2,779 satisfied customers
I have a 4 wire speed sensor. One set of wires plugs in and
I have a 4 wire speed sensor. One set of wires plugs in and goes by air cleaner on passenger side of truck. Where does the other one go … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Speedometer doesn't work only works part of time but doesn't
Speedometer doesn't work only works part of time but doesn't read right I think short wire … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2000 Peterbilt 379 that the speedometer quit
I have a 2000 Peterbilt 379 that the speedometer quit working a couple weeks ago. My mechanic said it has power to the back of the speedometer head that the head is probably bad. Just replaced the spe… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
3406 cat engine in 379 peterbilt needs rebuilt. was
3406 cat engine in 379 peterbilt needs rebuilt. was wondering if anyone can help me figure out which one i have because it does not appear to be the arriginal engine and all the plates are not on the … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
2006 peterbilt 379 with an isx500 had idle set with computer
2006 peterbilt 379 with an isx500 had idle set with computer lasted a month now it went back to idle at 800 tried cruise control to idle down but will not work what can i do to get idle back to 650… read more
William Herren
William Herren
A.A.S.
2 satisfied customers
1995 Pete 379 no speedometer Ecm shows the speed on computer
1995 Pete 379 no speedometer Ecm shows the speed on computer cruise works Can't retrieve the distance shows n/a… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 1991 peterbilt 379 with a cummings n14 celect , the
I have a 1991 peterbilt 379 with a cummings n14 celect , the engine is going to a safe idle mode when the oil preasure gauge drops to zero. the dealer ship advised me to replace the ecm which I did bu… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a 2000 Peterbit n14 engine running down the road it
I have a 2000 Peterbit n14 engine running down the road it won't go past 1500rpm if it drops below 1500 it will allow me to get to whatever speed is at 1500 more.… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I dont get power on 2 of the 4 wires on the ECM on a N14 Celect
I dont get power on 2 of the 4 wires on the ECM on a N14 Celect Plus, in a 98 Peterbilt, how can i troubleshoot the wiring on this?… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
How can i change how much the odometer shows that i drive.
How can i change how much the odometer shows that i drive. Ive got Cummins Insite. The truck shows 6 miles per hour slower at 50 MPH… read more
Travis A. Wells
Travis A. Wells
Truck Mechanic
Associates of Applied Science
15 satisfied customers
MY 2000 379 PETERBILT QUIT RUNNING GOING DOWN THE ROAD. IT
MY 2000 379 PETERBILT QUIT RUNNING GOING DOWN THE ROAD. IT HAS A C-15 Catapiller motor which has A million miles on it.I think it is electrical because the speedometer and tach quit working as I coast… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 1994 peterbilt 379 with a series 60 Detroit. I am
Hello, I have a 1994 peterbilt 379 with a series 60 Detroit. I am having cruise control problems like will not engage or it will engage then shut its self off. Any ideas? Thanks… read more
Buddy
Buddy
Diesel Technician
High School or GED
703 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 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

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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.

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