Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 2005 freightliner coranando after rising I apply my
I have a 2005 freightliner coranando after rising I apply my brakes my brake lights stay on and it's making my trailer brakes grab … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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Freightliner Columbia when I turn off headlights the
Freightliner Columbia when I turn off headlights the dashboard lights and the trailer lights do not turn off … read more
Mike
Mike
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I have a 2004 freightliner columbia that started losing air
I have a 2004 freightliner columbia that started losing air pressure driving down the highway.Then once I parked it built up again and now it's losing pressure while I'm sitting.Any suggestions? … read more
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Keiphun Sowell
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Are the airlines to the trailer universal in size?
Are the airlines to the trailer universal in size? … read more
Andy
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Have a 2007 Freightliner Columbia trailer ABS light stays on
Hey I have a 2007 Freightliner Columbia trailer ABS light stays on when clip to a trailer I swapped to a different trailer and the light is still on every time I connect the electrical cord I don't th… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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I have a 2007 freightliner columbia and I am having problems
I have a 2007 freightliner columbia and I am having problems with running lights on trailer to come on and off even when truck is off. The dash light will also be faintly on, for example the window sw… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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2003 columbia. No trailer brake lights. Have 12 V at pigtail
2003 columbia. No trailer brake lights. Have 12 V at pigtail from tractor. All lights on tractor work including brake. All other lights work on trailer. Hooked different truck to trailer everything wo… read more
Roy Belding
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I need some electrical help. I have recently purchased a
Hello, I need some electrical help. I have recently purchased a 2001 wabash van trailer that I have paired to a 2007 freightliner columbia. I am having a couple issues. 1) The turn signals on the trai… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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I have 2007 Freightliner Classic. I am having a problem with
I have 2007 Freightliner Classic. I am having a problem with the brake lights staying on after an application. This ONLY happens when connected to a trailer?? Tractor is fine when bob tailing. I have … read more
Wayne
Wayne
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Vocational, Technical or Trade Scho
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Need to figure out why this freightliner Columbia locks the
Need to figure out why this freightliner Columbia locks the brakes under a slight apply. Seems to be better when trailer is loaded. Replace tractor protection valve and treadle valve.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,563 satisfied customers
Got a 99 kW trailer brake lights not working checked
Got a 99 kW trailer brake lights not working checked connections on both truck and trailer checked relays and fuses changed turn signal switch and still no brake lights on trailer… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
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Hey spanky its roland again hopefully you can help me i have
Hey spanky its roland again hopefully you can help me i have a 1996 ford aeromax with a 11.1L detriot. seems i dont have power coming out of the junction box on the cab for the trailer brake lights. i… read more
spankyjr1
spankyjr1
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Hi, Fred here 2006 FTL Columbia no trl brake lights at trl
Hi, Fred here 2006 FTL Columbia no trl brake lights at trl cord plug cab end ? Truck has brake lights.… read more
Expert
Expert
i have a 2009 freightliner Cascadia, when I hit the brakes
i have a 2009 freightliner Cascadia, when I hit the brakes the trailer abs light on the dash comes on only when hooked to a trailer, any trailer. I changed the cord. it comes on only for about 3-4 sec… read more
Rudolph Diesel
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Hello, I have a 2000 sterling tractor and my trailer brake
Hello, I have a 2000 sterling tractor and my trailer brake lights are on as soon as the key is turned on and stay on, the underhood relay is getting "switch on' power with key on, also i get power at … read more
Wayne
Wayne
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Need advice on good used s/a medium-duty road tractor
Need advice on good used s/a medium-duty road tractor: I need help in setting up an Over-the-Road hotshot rig; a good used medium-duty road tractor to pull a stepdeck or lowboy-type flatbed trailer ra… read more
Jeremy
Jeremy
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i have a 2004 Freightliner Columbia. i do not have heat or
i have a 2004 Freightliner Columbia. i do not have heat or air blowing out of my vents in the sleeper. i do have heat/air blowing out of the dashboard vents. i recently replaced the blower fan in the … read more
semi truck tech
semi truck tech
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I have a 2005 Mercedes Columbia Freightliner.Trailer brake
I have a 2005 Mercedes Columbia Freightliner. Trailer brake lights stay on 100% of the time even though the tractor brake lights are not on and the tractor is completely shut down When hooked to a tra… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
13,108 satisfied customers
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Daniel Wilson

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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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