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Related Medium and Heavy Trucks Questions
I have the Cummins with derate on check engine light has
I have the Cummins with derate on check engine light has arrow down with a 2 hours showing service now on should I drive … read more
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I need the engine family name for my 2003 Peterbilt truck.
Hello, I need the engine family name for my 2003 Peterbilt truck. Vin # *****************. Also, is it a 379 engine? … read more
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We have a 2005 Peterbilt 379 and im looking for a diagram on
We have a 2005 Peterbilt 379 and im looking for a diagram on how to hook up the 4 12v batteries. Also how to put the ecm back on … read more
Bradey V
Bradey V
Certificate
Codes 289-6 and 290-6 comes up on my 2007 peterbilt 379, cat
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Cat Man
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Need wiring diagram for 1998 379 Peterbilt. 379 Peterbilt
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Andy
Andy
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I am having the same problem with my fuel tanks not
I am having the same problem with my fuel tanks not leveling. The passenger side would not go down. My mechanic replaced all three fuel lines and the fuel splitter valve and now the driver side will n… read more
spankyjr1
spankyjr1
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I have a 2004 C-15 Acert Single turbo conversion Peterbilt
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2006 Peterbilt 379. All Accessory Power intermittent power
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I need a wiring diagram for the Charge start system in a
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Wayne
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I need to know the switch # 1 position of the service brake
i need to know the switch # 1 position of the service brake pedal in peterbilt 369 and 387. the switch is on. … read more
Daniel Wilson
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I have an 2003 379 pete that will not build air pressure in
I have an 2003 379 pete that will not build air pressure in the passenger side air tank , which is the auxillary … read more
Daniel Wilson
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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
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Just bought 07 379, dome lites don't work and power mirror
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1994 Peterbilt 379 with 60 series Detroit diesel- The brake
1994 Peterbilt 379 with 60 series Detroit diesel- The brake lights only come on if I step on the brakes real hard. If I am using the brakes to slow down not stepping on them hard, they do not come one… read more
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I need a lay out of the fuses and brakers and usage chart
I need a lay out of the fuses and brakers and usage chart for a 1996 peterbilt 379. *****@******.***. Thank you… read more
kwpetetech
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Hi I have a 2007 peterbilt 379 with a c15 accert in it nxs.
Hi I have a 2007 peterbilt 379 with a c15 accert in it nxs. Will a 2000 6nz fit in it with out major modifications?… read more
Cat Man
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1988 peterbilt 379 with cummins 350 big cam engine im having
1988 peterbilt 379 with cummins 350 big cam engine im having starting problems after putting in new batteries new starter new ignition switch needs a jump to start on cold mornings… read more
Wayne
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I have a 1988 379 Peterbilt and the fuse panel is badHow
I have a 1988 379 Peterbilt and the fuse panel is bad How would you go about replacing the fuse panel? Can you get a complete panel aftermarket or original?… read more
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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

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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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