Everything else seems to be working. Question: 2003 Peterbilt 379 No Brake Lights My Speedometer And Brake Lights Quit Working In My 92 Peterbilt 379. The Light Control Module controls all of the lights on the vehicle, including headlights, taillights, turn signals, brake lights, fog lights and hazard lights. It will either shut off, be intermittent and weak, or not turn on at all. Without a ground, the gauge will not register. Anyways- if someone's been here before and said, "its third switch from the left on the right hand block" you would save me a bunch of work tomorrow. 5.) The truck was parked for about six weeks and not started. Brakes Do Not Release During hard braking, the wheel sensor controls the braking action to prevent wheel lockup. The truck was parked for about six weeks and not started. Can't find any fuses blown I'd suggest that you use a voltmeter to check if there is power on the positive (supply) side of the fuse panel, and I'd be betting that there isn't. I’ve heard stories of people getting pulled over for having a headlight out during the day ! 4.) It is highly unlikely that all the sender units are bad, so we can rule that out. I noticed the speedometer was not working and a friend told me the brake lights were out. All other lights and brakes work on trailer. Truck is a 1992 pete 379. 1.52 MB - pdf. Asked on Jun 28. Peterbilt 379 electrical questions. The truck was parked for about six weeks and not started. My trucks brake lights and speedometer does not work. I noticed the speedometer was not working and a friend told me the brake lights were out. Your brake lights also need to light up when the pedal is pressed. Brakes Do Not Apply-Connecting hoses to trailer crossed.-Faulty relay emergency valve.-Tractor protection valve not functioning properly or not in normal position (see operating instruc-tions).-No air pressure in air brake system.-Restricted tubing or hose.-Hoses between tractor and trailer not connected. I noticed the speedometer was not working and a friend told me the brake lights were out. Search Fixya ... Trailer towing clearance lights do not work. Jump to Latest Follow ... My problem is that the backup alarm will NOT work in conjunction with either the brake lights, or the hazard lights. If they are drawing too much power then switching to LED lights will solve that problem because they draw a fraction of the power compared to incandescent lights. A sensor at each wheel monitors wheel speed. cab lights wont work on 2001 379 peterbilt i have an 01 379 peterbilt and the cab lights along with the upper marker - Cars & Trucks question. My trucks brake lights and speedometer does not work. I should have air pressure low light, low air buzzer, power divider, brake switch, and I guess I'm forgetting something. Again, this is unlikely. Question: 1992 379 Peterbilt No Brake Lights My Speedometer And Brake Lights Quit Working In My 92 Peterbilt 379. Model 579, 567 Engine Aftertreatment Systems 2017 - French ... Help me understand why you want the alarm to work with the hazards or brake lights? My speedometer and brake lights quit working in my 92 Peterbilt 379.? I have a 1998 379 Peterbilt I don't have any brake lights, no turn signals, no 4 ways, doesn't even light up on the dash. Of course, it is also possible that all the gauges are malfunctioning. It is a drives sole responsibility to make sure all of these systems are working properly, if not, you are going to get pulled over. My trucks brake lights and speedometer does not work. The anti-lock braking system (ABS) in a big truck is very similar to those in most vehicles. Model 579, 567 Engine Aftertreatment Systems 2017 - French. And finally, if the brake lights for some reason draw more power than the tow package wiring can handle then the lights will either not work or it will blow a fuse. Asked on Jun 28. 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