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Related Medium and Heavy Trucks Questions
I'm looking for a schematic for a Peterbilt 379 for the
Good morning, I'm looking for a schematic for a Peterbilt 379 for the ignition key, to relays and fuses and also ECM power please. Thank you kindly. Vin is ***************** Engine mbn23633 thank you … read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
17 satisfied customers
I have a 3406 in2003 Pete 379. No power to pin 21. Need to
I have a 3406 in2003 Pete 379. No power to pin 21. Need to know where it gets it's power from. … read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
17 satisfied customers
Need fuse box diagram with location and function of all
hello need fuse box diagram with location and function of all fuses and relays working in a 2000 379 peterbilt vin is 551224… read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
17 satisfied customers
I have a 2005 379 peterbilt my flashers have quit working
I have a 2005 379 peterbilt my flashers have quit working there is no blown fuse … read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
17 satisfied customers
Where's the fuse located on 2001 peterbilt 379 that powers
Where's the fuse located on 2001 peterbilt 379 that powers the 6 pin diagnostics port ? … read more
NicholasM1019
NicholasM1019
Diesel Technician
Vocational, Technical or Trade School
17 satisfied customers
Need wiring diagram for 1998 379 Peterbilt. 379 Peterbilt
I'm rewiring running lights and headlights yes doing it myself … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
211 satisfied customers
I have a 2005 peterbilt 379 with a cat acert C15 in it the
I have a 2005 peterbilt 379 with a cat acert C15 in it the blower motor will not work on any speed I have gotten the multimeter out and started checking when I go to any point in the system be at the … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
211 satisfied customers
Lost power to my headlight and marker light switch on 2007
lost power to my headlight and marker light switch on 2007 379 pete … read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,636 satisfied customers
2006 Peterbilt 379. All Accessory Power intermittent power
2006 Peterbilt 379. All Accessory Power intermittent power issue … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
211 satisfied customers
I need a wiring diagram for the Charge start system in a
I need a wiring diagram for the Charge start system in a 2001 Peterbilt 379 with c16 … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
I have a 1990 Peterbilt with a Series 60 Detroit. All of a
I have a 1990 Peterbilt with a Series 60 Detroit. All of a sudden it won't start. It cranks good but won't fire. Any ideas? … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
Turn signals not working. 1996 Peterbilt 379. Cat 3406C.
Yes. Trying to. Unplugged individual lights at front and rear of truck one by one. Changed flasher behind dash. shaking wires to try and find ground problem. Somebody changed the fuse box cover panel, so there is no diagram for me to know which fuse is which. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
Just bought 07 379, dome lites don't work and power mirror
just bought 07 379, dome lites don't work and power mirror also . fuses good, heat does work om mirror … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
Have a 2004 peterbilt 379 with CAT C 15 engine. There is a
have a 2004 peterbilt 379 with CAT C 15 engine. There is a broken wire in ECM harness shorting to ground. Having difficulty finding the other end. Need a wiring diagram for power from battery box to E… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 satisfied customers
Yesterday my speedometer, odometer, voltage gauge and
Yesterday my speedometer, odometer, voltage gauge and instrument light cluster stopped working. Checked fuses and relays in fuse box as well as relay directly behind gauges. Could not resolve the prob… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
5,454 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
5,454 satisfied customers
I have a 2004 peterbilt that has lost all the interior lights
I have a 2004 peterbilt that has lost all the interior lights and radio do you have an idea where the problem could be at?… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
Need a wiring diagram for a 1998 Peterbilt 379 ext hood for
Need a wiring diagram for a 1998 Peterbilt 379 ext hood for the engine compartment and cab.… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
211 satisfied customers
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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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