What does the trailer air supply knob do?
What does the trailer air supply knob do?
The trailer air supply control on newer vehicles is a red eight-sided knob, which you use to control the tractor protection valve. You push it in to supply the trailer with air, and pull it out to shut the air off and put on the trailer emergency brakes.
What are the red and yellow buttons on a semi?
Press the yellow button labeled “Parking” while your foot is on the brake pedal. This will release the truck air brakes. Press in the red button labeled “Trailer” if a trailer is attached. This will release the trailer brakes.
What gear should the tractor transmission be in after you have uncoupled?
You should place the tractor transmission in which gear after you have uncoupled the trailer? Neutral. You are driving a combination vehicle.
Where is the low pressure switch on a Freightliner?
I have replace the Low Pressure Switch located beneath the Park Brake Release Knob. I have even bypassed the Low Pressure Switch by replacing it with an On/Off switch. The problem continues. I heard there is another type of switch located somewhere else.
How does the brake warning light and buzzer work?
In addition to the brake warning light and buzzer, my driving lights turn off and on in unison with the brake warning light and buzzer. A new development is that my electric slide outs (2) seem to be acting up in that I sometimes have to move the ignition switch on and off a couple times to get them to work.
Where is the parking brake light on a Freightliner?
I discovered that there is a Green Wire running from the front panel (under drivers window) to the rear panel (last bay on passenger side) that connects to a solenoid. It was barely holding on and came off when I pulled on it. I reattached it and tested the slides. They worked fine.
How to contact the Freightliner Customer Support Center?
CUSTOMER SUPPORT CENTER This is the number to call for chassis wiring PDF files and questions regarding issues. You will need the coach VIN number, and give them all the information you can and where you went for service. Try to get everyone on the same page and hopefully that will help speed up a resolution.
How is the engine started on a Freightliner truck?
In the ON position, the key is turned clockwise. All electrical systems are operable. Low air- and oil-pressure warning lights (or messages) and buzzer operate until the engine is started and pressure is built up. The engine can be started and operated only when the ignition switch is ON.
Where are the turn signals on a Freightliner truck?
Utility lights can be swivel-mounted on top of the cab, mounted on the cab side-extender, or flush-mounted in the back of the cab or sleeper. They are turned ON and OFF using the switch (UTLY LAMP) located next to the headlight switch. See Fig. 5.2 . The turn signal lever is mounted on the steering column. See Fig. 5.2 .
How does the express function work on a Freightliner truck?
Press the switch in the rearward position to lower the window. Hold the switch down for approximately one second to activate the express function; the window will continue to roll up or down after the switch is released. Pressing the power door lock switch opens or locks both the driver’s and passenger’s doors simutaneously.
Where is the power window control on a Freightliner truck?
Power windows are standard on 122SD and Coronado vehicles. In addition to the control on the driver’s door, the passenger door has a switch mounted in the top of the door, that controls the passenger-side power window. IMPORTANT: There is no anti-pinch protection when the window is almost closed.
