Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
02 Pete with ISM Cummins engine fan on all the time if I put
02 Pete with ISM Cummins engine fan on all the time if I put air to it it comes off and have power from dash switch out but no power at plug for solenoid on firewall … read more
NicholasM1019
NicholasM1019
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Vocational, Technical or Trade School
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1995 peterbilt 379 engine cat 3406e, the engine fan dont
1995 peterbilt 379 engine cat 3406e, the engine fan dont work when engine is asking for, the fan works from the cab override switch, so the solenoid and harness from the switch work, need some diagram… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have 1999 peterbilt engine fan wont come on automaticly.
Hi i have 1999 peterbilt engine fan wont come on automaticly … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Put all new injectors in are 3406e cat. We can't get it to
Put all new injectors in are 3406e cat . We can't get it to start but it will start with starting fluid and run just fine . Before starting fluid there was no tachometer signal when trying to start it… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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Catman peterbilt with c15 acert. MXS why is my engine fan
catman peterbilt with c15 acert. MXS why is my engine fan always running.. i have CAT ET. what/how do i check ?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
I'am working on a 2006 Peterbilt truck with a CAT engine.
Hi, I'am working on a 2006 Peterbilt truck with a CAT engine. the engine serial number is ***** The engine fan is stuck on all the time. The fan clutch uses air to disengage.I manually put air to the … read more
Cat Man
Cat Man
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Catman, Have a problem with a 5EK not starting, not getting
Hey Catman,Have a problem with a 5EK not starting, not getting any engine speed, do not have any engine speed codes, just needing some advice Thanks… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 97 Peterbilt 378. I had some welding done in the
I have a 97 Peterbilt 378. I had some welding done in the frame yesterday and the truck ran fine today. While driving today, I noticed my engine brake would only work when I pressed the brake pedal, a… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
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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Cruise not working, 2001 379 peterbilt cat 6nz, traced wires
traced wires and switches checked ecm found ecm has service brake ON new switch also found wire 281 has power not sure why … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e 40 pin. What do I need for the cab. I have the harness from the ecm to the firewall from a donor truck. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Mr. Cat Man, I have a 6NZ cat in a 379 peterbilt. None of my
Mr. Cat Man, I have a 6NZ cat in a 379 peterbilt. None of my check engine lights and stop engine lights illuminate when the engine runs hot or when I unplug any sensor,, however they do throw faults o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Cat man. I have a c15 that will not engage clutch fan when
Hello cat man. I have a c15 that will not engage clutch fan when coolant temp reaches high temp. Fan will come on manually with switch and comes on with a/c. Temps climb to atleast 220. New temp switc… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,253 satisfied customers
Cat Man I have a 1LW that isnt turning on the cooling fan when
Cat Man I have a 1LW that isnt turning on the cooling fan when the a/c sends the signal to. I can make the solenoid come on with the diag test can I change something in my config to fix this?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I am working on a Caterpillar engine, C15 - Sn#6NZ01357. Using
I am working on a Caterpillar engine, C15 - Sn#6NZ01357. Using Cat ET, is there a way to program the temp that the engine cooling fan turns on? Cant get the fan to come on, let the engine get to 215 a… read more
Cat Man
Cat Man
Cat Engine Expert
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i have a 2008 peterbilt 388 c15 cat cooling fan does not come
i have a 2008 peterbilt 388 c15 cat cooling fan does not come on with temp or manual switch. there is no power to switch on dash or solenoid under hood.no blown fuses at panel i would like to find out… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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i do not have power to my guages, cab fan blower, ecm, daytime
i do not have power to my guages, cab fan blower, ecm, daytime running lights. engine starts and cruise switch works but pressing the break pedal does not disengage the cruise checked all the fuses in… read more
Expert
Expert
I have a 98 Peterbilt 378, with 3406E engine. I has the ignition
I have a 98 Peterbilt 378, with 3406E engine. I has the ignition switch, you turn it to "run", and then press a "start" button. This morning I was changing a bulb behind the gauge B panel with the tru… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

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

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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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