Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 379 Pete, the jake does not work. I have no power
I have a 379 Pete, the jake does not work. I have no power to the jake brake switch. Is this my problem?? … read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
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I have a 1996 model 379 peterbilt with a cat 3406e in it.
I have a 1996 model 379 peterbilt with a cat 3406e in it. The cruise control has started not working intermittently. I thought it had to be the on/off switch so I changed it and it still does the same… read more
BrentR718
BrentR718
9 satisfied customers
I have a 2001 freightliner century with a 12.7 Detroit
I have a 2001 freightliner century with a 12.7 Detroit 60series, my jakes are not activating neither does my cruise control work when running down the road. My cruise control does work when i bump up … read more
Bradey V
Bradey V
Certificate
1997 kenworth t800 with Cummins m11. Bought truck found for
1997 kenworth t800 with Cummins m11. Bought truck found for unknown reason the owner swapped out the instrument levers on the right side … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
2000 peterbilt with cat c12 engine Jake's dont work I want
2000 peterbilt with cat c12 engine Jake's dont work I want to wire them directly with my own switch … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Picked my truck up at the mechanics and noticed the jakes
Picked my truck up at the mechanics and noticed the jakes would not turn off. He stated that he heard my horn honking one morning and he unplugged it. We started pulling fuses and relays got the Jake … read more
Bradey V
Bradey V
Certificate
I have a truck that's a peterbilt 379 with a cat c15 and
I have a truck that's a peterbilt 379 with a cat c15 and Jake brakes are not working on it when I turn the switch on nothing happens when I supply direct power my jake brakes work it electrical has no… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
96 pete 379. Replaced tps and just like the last one, when i
96 pete 379. Replaced tps and just like the last one, when i let off the throttle my check engine light comes on and i have no throttle. I can tap the side of the footfeat with my foot and throttle co… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 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
Need help with cruise control and Jakes on this 99
Need help with cruise control and Jakes on this 99 freightliner classic Vin 1FUPCSEB6YDB06724 not working fuses are good… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
443 satisfied customers
06 Cat C15 NXS. Jakes stop working after an hour or so of
06 Cat C15 NXS. Jakes stop working after an hour or so of running. If driver restarts the engine, jakes resume working for another hour or so and the cycle continues. We did get a PID-84 before it sta… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Right side brake light does not work turn signal does. 2005
right side brake light does not work turn signal does … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
210 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
4,737 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
10,253 satisfied customers
Im working on 1992 peterbuilt 379 with 3406 cat engine vin#
I'm working on 1992 peterbuilt 379 with 3406 cat engine vin# XXXXX I need a wiring diagram for head lights and tail lights . do not have tail lights and when you turn on the cab lights the right low b… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 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
I have a 2001 Freightliner FLD120 with a Series 60 Detroit.
I have a 2001 Freightliner FLD120 with a Series 60 Detroit. I have been having a problem with the cruise control. A lot of the time I will have to tap the brake pedal to get it to work. Sometimes it w… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a 2000 peterbilt 379 with an N14 cummins. The cruse
I have a 2000 peterbilt 379 with an N14 cummins. The cruse control has quit working. The Jake works and the break lights aren't on. The switches on the dash are working.… read more
JANECZFJ
JANECZFJ
158 satisfied customers
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Daniel Wilson

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Chris (aka-Moose)

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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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