Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a C-16 Cat engine in a 2002 379 Pete. The engine fan
I have a C-16 Cat engine in a 2002 379 Pete. The engine fan will not come on until the temp reached 225 degrees. I have checked the temp gauge accuracy with a hand held laser heat gun and a digital th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
The engine fan will not come on automatically when water
The engine fan will not come on automatically when water temp gets high under a load. The fan works when I turn on manual switch and the fan works with the high pressure side of A/C. this is a C-16 en… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I got a 3406E with a 208 thermostat and its been about
I got a 3406E with a 208 thermostat and its been about 80s-90s and temp has been running 205-210 and fan hasnt been kicking on till 212-213 and was wondering if that was normal or bad sending unit or … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2005 Peterbilt 379 I am looking for a wiring
Good morning I have a 2005 Peterbilt 379 I am looking for a wiring diagram on the fan control. Fan appears to be running all the time. I supplied air straight to the fan clutch and the fan turns off. … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have a 04 pete 379 couple years ago it started running
I have a 04 pete 379 couple years ago it started running warmer than normal empty or loaded like it wasn't getting any air but I could flip my fan on and it would cool right back down, so I broke down… read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 satisfied customers
Peterbilt 2004 379 bxs 10888 cat c15 -problem is engine when
peterbilt 2004 379 bxs 10888 cat c15 -problem is engine when running down road at cruise, engine will cool to about 150 degrees. sit at loading dock and idle will run about 190. pull a hill will come … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
2005 Peterbilt 379 c15 acert cooling fan comes on at the
2005 Peterbilt 379 c15 acert cooling fan comes on at the correct temp. but noticed it will not stay on long enough to bring temp. down. shuts off fan prematurely. … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Im looking for a wiring diagram for the a/c system on a 1991
Im looking for a wiring diagram for the a/c system on a 1991 peterbuilt 379 … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have 2007 peterbuilt model 379 with cat c15 twin turbo
I have 2007 peterbuilt model 379 with cat c15 twin turbo nxs, exhaust goes high up to 1200 … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
My engine fan will not turn on. Either with the manual
My engine fan will not turn on. Either with the manual switch or just letting the ecm do it by water temp. I've replaced the fan air solenoid and it still will not engage. Unless I cut the wires to th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
2002 379 pete c15 6nz cat .engine will not start without
2002 379 pete c15 6nz cat .engine will not start without either . has new fuel pump new injectors new cam and crank sensors new engine wiring harness new check valves new filter housing, new ecm. Has … read more
Edward Haniewski
Edward Haniewski
General Studies/Automotive
1 satisfied customers
The engine temp runs up to 212 degrees and fan isn't coming
The engine temp runs up to 212 degrees and fan isn't coming on. I replaced the fan trigger on the thermostat housing and checked the thermostats. I have a 170 and a 180 degree thermostats on it and th… read more
PATRICK WENSLEY
PATRICK WENSLEY
Associates Degree Of Applied Science
I have a 2003 pb379 the a/c compressor won't cycle. I have
I have a 2003 pb379 the a/c compressor won't cycle. I have replaced all the pressure switches and still won't. My question is there a thermostat in the system … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have a 2003 Kenworth T600 with a Caterpillar engine. VIN
I have a 2003 Kenworth T600 with a Caterpillar engine. VIN 1XKADB9XX3J705296 Getting code for temp sensor and fan is staying on. Temp gauge in truck is operating properly.Code: MID 128 PID 110 FMI 3 E… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2003 Peterbilt 379 with a C15 Cat engine I have a
I have a 2003 Peterbilt 379 with a C15 Cat engine I have a problem with the temp gauge showing hot the last while it seems to be electrical. what could i check for this condition?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Good Morning Cat Man, I have a Cat C15 engine, ESN MXS
Good Morning Cat Man, I have a Cat C15 engine, ESN MXS 24605, Peterbuilt vin # ***** 2009, model 379,that we replaced the ECM in that has some issues. Since replacing the ECM the cruise control does n… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 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 am working on a 1989 peterbuilt 379 with ntc 444 enginewith
I am working on a 1989 peterbuilt 379 with ntc 444 enginewith a low flow cooling system, I would like to know how the coolant hoses go some are 1 1/4" some are 1" so a diagram would be helpful. this e… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 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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