Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 2001 Mack dump truck I have a 7 way prong I'm
I have a 2001 Mack dump truck I have a 7 way prong I'm trying to wire to my trailer and having no luck I also have a air actuator that connects to it I have a brown yellow blue white 2 black and 2 red… read more
Daniel Wilson
Daniel Wilson
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2012 peterbilt 388 ..brake lights work on the truck ..all
2012 peterbilt 388 ..brake lights work on the truck ..all lights work on the trailer except brakelights ..theres no power to the red wire coming from the truck to the socket you hook yout trailer pigt… read more
Wayne
Wayne
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I have a 07 freightlinerclassic xl, im having issues with
Hi Steve I have a 07 freightlinerclassic xl, im having issues with the wiring that supplies the trailer power, my issues are as followed when right turn signal is on the left center light flashes to, … read more
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Want to be connected to Wayne to get my question answered.
want to be connected to Wayne to get my question answered … read more
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I have a 2006 freightliner, single axle, it is a Columbia
I have a 2006 freightliner, single axle, it is a Columbia model, I wish to wire a brake controller for a trailer, the truck has a trailer socket at the back of the truck, the trailer plug needs to be … read more
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Right side brake light does not work turn signal does. 2005
right side brake light does not work turn signal does … read more
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I have a 1995 international 4700 that the hazard lights are
I have a 1995 international 4700 that the hazard lights are not working on the bed all other lights work. The hazard lights work on the cab. I replaced the turn signal switch and wiring harness but st… read more
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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
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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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I have an 2000 Kenworth W900L and yesterday I lost taillights
I have an 2000 Kenworth W900L and yesterday I lost taillights on my trailer. Still have them on my tractor. Tried finding a fuse labeled "TRL STOP" as this has been a problem in my 2007 KW T600 and ch… read more
spankyjr1
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I have no brake lights on my semi trailer. All the lights work
I have no brake lights on my semi trailer. All the lights work on truck and trailer except the trailer brake lights, tractor brake lights work. The red wire coming out of the electric pig tail on truc… read more
Wayne
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I have a 2013 Peterbilt 389 that keeps blowing out its tail
I have a 2013 Peterbilt 389 that keeps blowing out its tail lights. Hazards, light signals, brake lights work fine. But I cant run my truck after dark because of running tail lights wont work. If I ho… read more
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2001 379 Pete when it is hooked to a trailer the tail lights
2001 379 Pete when it is hooked to a trailer the tail lights on truck and trailer went out and the headlights went to high beams and there was now way to shut high beams off.… read more
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Kenworth K100: Im wiring a trailer brake box to my semi so
I'm wiring a trailer brake box to my semi so I can haul my gooseneck trailers with it. Where is the brake switch located on a 1989 cab over Kenworth K100?… read more
spankyjr1
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I need to haul a large horse trailer and horses with my 1995
I need to haul a large horse trailer and horses with my 1995 International 9200. The horse trailer has a 6 pin round connector. Is there an adapter to go from my 7 pin round to the 6 pin round? What's… read more
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I have a 2010 kenworth w900l I am having turn signal problems.
I have a 2010 kenworth w900l I am having turn signal problems. My right signal does not work no indicator light no trailer or fender lights but the rear light does work. I have swapped the flasher mod… read more
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Why does my peterbilt 367 semi blow a 20 amp fuse in the power
Why does my peterbilt 367 semi blow a 20 amp fuse in the power G5 fuse location in the engine compartment fuse panel when I use the left turn signal… read more
spankyjr1
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Is there a fuse for the center pin? I need to instal a switch
Is there a fuse for the center pin? I need to instal a switch to kill power to the center pin on pig tail. My trailer is set up to kill power to center pin to keep air bags full, it is a spread axle t… read more
Wayne
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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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