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Related Medium and Heavy Trucks Questions
I have a 1995 378 Peterbilt with 3406e and the Jake's stop
I have a 1995 378 Peterbilt with 3406e and the Jake's stop working. at first if I turned the switch off and on ,it would Actuate . but now something weird, if you press down on the brake pedal hard it… read more
SteveR
SteveR
Shop Manager
High school
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Peterbilt 389 mtg date 07/2007 cat c15 alert engine ser. #
Peterbilt 389 mtg date 07/2007 cat c15 alert engine ser. # SDP 04448. Would like a wiring schematic for vva and Jake solenoids from solenoids to ecm engine plug. Also a schematic from ecm oem plug to … read more
Nich1019
Nich1019
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Jakes won't work c15 cat 2004 KW 900l Have replaced dash
jakes won't work c15 cat 2004 KW 900l Have replaced dash switches clutch switch works. every once in a while the jakes will come on but not very often … read more
Nich1019
Nich1019
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I have a 2006 Peterbilt 387 with a MXS C 15 engine. My
I have a 2006 Peterbilt 387 with a MXS C 15 engine. My engine brake is not working and have been troubleshooting on my own with no luck. Cruise control works on idle. What can I do to start and rule o… read more
Nich1019
Nich1019
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Jake brake stopped working on our 2002 Peterbilt 379. It's
Jake brake stopped working on our 2002 Peterbilt 379 … read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
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Engine brake won't work on low setting. Has new harness
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Nich1019
Nich1019
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I'm working on a cat c-15 engine in a 2001 Peterbilt. the
HI, I'm working on a cat c-15 engine in a 2001 Peterbilt. the engine serial number is ***** Engine Jakes are not working. Accel pedal, clutch pedal, on/off and stage switches working. No codes active … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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I have a 2009 peterbilt 378 with a C15 cat in it and the
I have a 2009 peterbilt 378 with a C15 cat in it and the cruise control works but it will not resume any idea what that is … read more
Wayne
Wayne
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Vocational, Technical or Trade Scho
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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
Nich1019
Nich1019
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Cat 3406E S/N 5EK19196 in a 1995 peterbilt 379. I am getting
Cat 3406E S/N 5EK19196 in a 1995 peterbilt 379. I am getting problems with my water temp switch, engine fan either in automatic or manual. I am also getting a CEL when I use the Jake brakes. The water… read more
Nich1019
Nich1019
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2003 peterbilt 378 vin 1CP-FDBOX-6-4D808339 cat C 15 MBN
2003 peterbilt 378 vin 1CP-FDBOX-6-4D808339 cat C 15 MBN jakes,cruise control quit working I'm looking for the inputs to J2 from cab switches test good & controlling ground I would like pin numbers at… read more
Nich1019
Nich1019
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I a cat c13 Avery and the Jake brake dose not work at all
I a cat c13 Avery and the Jake brake dose not work at all where do I start … read more
Cat Man
Cat Man
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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
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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
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Vocational, Technical or Trade School
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We have a C15 Acert in a 2005 Peterbilt 378. The jake brake
We have a C15 Acert in a 2005 Peterbilt 378. The jake brake only works on low and before that it was working in every position but started cutting out. Now it is only giving us low and there is no pow… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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The fan doesnt come on with jakes or when engine temp is hot
the fan doesnt come on with jakes or when engine temp is hot in our 1998 peterbilt 378 with a 3406e … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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2004 Peterbilt 379 w/C15 acert fan will not turn on with
2004 Peterbilt 379 w/C15 acert fan will not turn on with switch in "auto". Gets up to 225-230 with no warning light or buzzer. It just started doing this about a week ago. Prior to that it kicked on a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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C15 truck engine, serial # XXXXX Cat compression brake.
C15 truck engine, serial # XXXXX Cat compression brake. Customer run overhead and engine brake quit working, customer replaced switch... Need troubleshooting and engine brake lash steps...… read more
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Cat Man
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

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I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

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cumminsdr

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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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