Sometimes, pressing the brakes turns off the tail lights too and they don’t start working again until you let the brakes off. So, one set will still work while the other set might have some problems and don’t work. Only have tail lights for the trailer, as long as the headlights are off on the truck. Brake lights work fine until the headlights are turned on. The possible reasons for brake lights not working but tail lights are: Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. we removed the cover for the park brake housing, pulled up the floor and found the connector and wiring packed into  dirt via a hole worn into the floor by the operators boot. Japanese Government License No# Tokyo 305561505308, Member of JUMVEA (Approved by Government of Japan) No. the solution may surprise you! Connect the light switch to a good ground with a jumper wire and press the brake pedal. If the brake light turns on, you have to fix the ground connection. Any problem with the fuse box and light switch will affect the brake lights. When the driver takes his foot off the brake pedal and presses the throttle pedal the clutch will reengage and the PTO will start to turn again. Mack Trucks has a long history of pioneering safety innovations, so it was no surprise features related to safe operations were a top priority for engineers when they designed the new Mack Anthem ® highway tractor.. When coolant temperature is excessive, the red STOP tell-tale illuminates and the buzzer will sound. Then there is no lights at all that work on the trailer. The brake light won’t respond if the switch is damaged or bad. The Causes Why Tail Lights Not Working. If the temperature remains below or exceeds the normal temperature range, the cooling sys- tem should be checked for problems by an authorized Mack Vehicle dealer. Tail lights could turn off for several reasons and they are almost similar to the causes why brake lights not working but tail lights are. please help me. ... Each company we work with has specific experience requirements for their drivers. I’m having the same issue currently. If all the components mentioned above are working just fine, you have to look somewhere else to find the source of the problem. Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. Free shipping. I have a 2005 Mack Granite CV712. The transmission will not shift gears and driver is limited to about 6 MPH. You need to replace bulbs if they have got darkened or the filaments are blown. Besides, try to find out the cause of the blown fuse. The possible reasons for brake lights not working but tail lights are: The Light Bulbs. The ECM runs numerous checks on the condition of switches it requires to initiate a parked Regen. Push the bulbs and turn them counterclockwise to remove from the socket. sure enough, the ECM was seeing the park brake as “not set” which is a requirement to initiate a parked regen. I have a Ford Focus St. All my lights work , but if I have my lights on at night travel, and if I try pressing my brake, then my left rear lights goes off. For turn signal not working it can be faulty turn signal switch or its issue with wiring:----. Usually when the “Regen” button flashes, its an indicator to the driver that a condition isn’t met. Ownership, maintenance and mechanical issues forum for all Mack truck models, including Pinnacle, Vision, Titan, Granite, CH, CX, CV. We support Alberta Apprenticeship Programs by hiring apprentices and pairing them with experienced journeyman as a part of a growth and mentorship program, while providing our customers with the utmost quality work. My backup lights and wired in backup alarm are not working. You have to change these parts if found any such problem. In case if the fuse is blown, change it with a new one. Make sure that none of the wires is damaged. The switch has been replaced in the dash and there is currently power in to the switch and power out of the switch but the lights still don't work. Thank you. There might possible have been or … It takes a long time to notice when the brake lights not working but tail lights are or vice versa. ... Trailer Wiring Harness for a 2014 Mack Truck Granite; He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. If the warning light has text. step number one; hook up the computer and check to see what condition the ECM is reading, this rules out a burnt out dash bulb. US Stock 5" 18LED Car Motorcycle Working Light Flood Beam LED Lamp 54W 8000LM X1 (Fits: Mack CXU) $28.89. How to Troubleshoot Big Truck ABS Lights by Alibaster Smith . The causes for dysfunctional rear lights are: If you still cannot find out the problem for your non-functional brake lights or tail lights or are not sure about the steps mentioned above, take the vehicle to an expert mechanic. I seem to have power at - Answered by a verified Technician ... sorry we got the truck and comp was wired to switch in dash we replaced comp, ... 07 mack granite Ctp713 no brake light's. We pride ourselves in hiring and developing strong individuals. If anyone of these conditions are not met, the truck will not cooperate. In this instance, the driver did everything correctly but the truck wasnt responding. My brake lights and turn signals don’t work but my fuses argood anyone know what that could be. The driver places the truck on a surface away from potential fire hazards, sets the park brake, insures the cruise and engine brake switches are in the off position then holds the “Regen” button like hes supposed to… problem is, the light on the button just flashes and nothing happens. When the fuse is blown it does not allow the circuit to complete. I am having issues with my marker lights and tail lights going out and staying out. It can be faulty brake light switch causing the problem or its blown brake light bulb. This is what I am trying to figure out. i have a 2000 saturn LS1, my brake lights will not come on, I have changes the brake light switch, both the two prong and the four prong switches, the bulbs are fine and the fuses are fine. The rear and headlights have separate connections. at this point, were hot on the heels of the problem. Remove the screws from the bulb lens (which you can access through the trunk or see your vehicle repair manual to get the exact location). Turn signal tail lights and BRAKE LIGHTS NOT WORKING. We had a customer come in to us today complaining that the dash lights are calling for the driver to do a parked DPF regeneration but the truck wont let him do it. So the result is, no running lights at all on the trailer side. Thanks, Matt Expand your inspection forms to make sure you're checking every single head lamp, tail lamp, turn signal, reflector, warning lamp, license plate lamp, fog lamp and marker for damage or dimness. Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. Cant do a parked regen? >> A list of high-quality used cars from Japan you should have a look at <<. Check the switch’s wiring diagram and find the single wire that establishes a connection between the brake light and turn signal switches. Don't just “check lighting,” though. On a Mack Midliner truck the dash display reads brakes worn, Maintenance Due, and Body Lights On. 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