Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have 2003 Freightliner Columbia with a 6NZ CAT engine.
I have 2003 Freightliner Columbia with a 6NZ CAT engine. When the truck is driving a 70 MPH check engine light comes on and truck slows down to about 65mph then goes back up to 70 and check engine lig… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
2000 freightliner classic fan won't shut off. Put a new temp
2000 freightliner classic fan won't shut off. Put a new temp switch in block new air Solenoid solenoid. We have no power at air solenoid or both low or high a/c switches , but a/ works. All breakers h… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
402 satisfied customers
Cat Man, When it rains it pours.....I have another MXS29744
Cat Man, When it rains it pours.....I have another MXS29744 in an 05 Pete 379 VIN 891832. This truck presents with an engine fan concern. The fan does not come on automatically, it does work with the … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 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
10,218 satisfied customers
I have 2000 Freigthliner is no power to the solenoid. 2000
I have 2000 Freigthliner is no power to the solenoid … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Caterpillar 6nz with key on dashboard display reads no data
Caterpillar 6nz with key on dashboard display reads no data link communication … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
My fan on a c15 6NZ will not come in, have power from ecm,
Hi my fan on a c15 6NZ will not come in, have power from ecm, have changed temp sender works on manual switch but can not get it to come on automatically. Can switch it on and off with laptop also… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I have a CAT C12 and the Fan doesn't turn on automatically
I have a CAT C12 and the Fan doesn't turn on automatically only when I turn it on manually. However it does turn on automatically when the AC is on … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I'm working on a 2005 w900 with a cat c15, i have a code for
I'm working on a 2005 w900 with a cat c15, i have a code for the oil pressure control valve and the engine fan is stuck on. Could that valve be keeping the fan on if it's bad? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I have the C15 6NZ, my engine fan spin all the time, i
Hi i have the C15 6NZ , my engine fan spin all the time, i change new silinois and new fan clutch still same, no power come out the EGM, also level sendser it not work, engine break not work and cruis… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I have a 2000 Pete with 6nz c-15 I lost switch power to ecm
I have a 2000 Pete with 6nz c-15 I lost switch power to ecm so I just ran a jumper wire from fuse box to pin 70. My problem now is when I turn engine fan switch on the truck dies. What do I need to do… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
Just put a cat motor in my classic and trying to find a
just put a cat motor in my classic and trying to find a diagram for the new wiring harness for the ecm … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I have a 2001 freghtliner classic with a c15 cat engine
i have a 2001 freghtliner classic with a c15 cat engine serial number 6nz14776 and the fan wont turn when temperature starts geting hire … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I have a 2008 peterbilt 389 with a cat 6nz motor. My engine
I have a 2008 peterbilt 389 with a cat 6nz motor. My engine fan keeps turning on every 10 min and staying on for 5-10 min at a time. Coolant temperature is fine. Any idea what could be causing this?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
put bxs engine converted t9o 6nz in 97 pete everything seems
put bxs engine converted t9o 6nz in 97 pete everything seems to be fine except the fan let me explain with the engine harness disconnected I have power on both sides of the ac system also both sides o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
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
Vocational, Technical or Trade Scho
10,218 satisfied customers
Hey buddy I have a C-15 6NZ ser# XXXXX engine fan will not go
Hey buddy I have a C-15 6NZ ser# XXXXX engine fan will not go off. I've changed fan siliniod , A/C high pressure switch and temp sensors on the thermostat housing. I've ordered a wiring harness but so… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 satisfied customers
I have a 2006 Freightliner tractor that has the motor cooling
I have a 2006 Freightliner tractor that has the motor cooling fan that runs constantly. We checked the wiring, ground and changed all sensors that are involved with it but it can be turned off and on … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,218 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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