2019 FORD F-650 Warning Lights and Indicators User Guide
This Guide covers 2019 Ford F-650 warning lights and indicators. Drivers receive notifications regarding system failures, maintenance, and safety issues to keep the car running properly.
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Video: 2019 FORD F-650 Warning Lights
WARNING LAMPS AND INDICATORS
The following warning lamps and indicators alert you to a vehicle condition that may become serious. Some lamps illuminate when you start your vehicle to make sure they work. If any lamps remain on after starting your vehicle, refer to the respective system warning lamp for further information.
Note: Some warning indicators appear in the information display and operate the same as a warning lamp but do not illuminate when you start your vehicle.
Anti-Lock Braking System
If it illuminates when you are driving, this indicates a malfunction. Your vehicle continues to have normal braking without the anti-lock brake system function. Have your vehicle checked as soon as possible.
Illuminates when you switch it off.
Battery
If it illuminates while driving, it indicates a malfunction. Switch off all unnecessary electrical equipment and have the system checked by an authorized dealer immediately.
Brake System
WARNING: Driving your vehicle with the warning lamp on is dangerous. A significant decrease in braking performance may occur. It may take you longer to stop your vehicle. Have your vehicle checked as soon as possible. Driving extended distances with the parking brake engaged can cause brake failure and the risk of personal injury.
Indicates low brake fluid level or a brake system malfunction. Have the system checked immediately by an authorized dealer.
Illuminates when you may not have properly installed the fuel cap. Continued driving with this light on may cause the Service engine soon warning indicator to come on.
Check Suspension 
Illuminates when you press the air suspension dump switch.
Cruise Control 
Illuminates when you switch on this feature.
Illuminates with the key in the ON position, when the fluid is contaminated or the level falls below 1.0 gal (3.8 L). Refill the tank or, at a minimum, add at least 1.0 gal (3.8 L) in the tank.
Direction Indicator
Illuminates when you switch on the left or right direction indicator or when you switch on the hazard warning flashers. If the indicators stay on or flash faster, check for a burned-out bulb.
Door Ajar
Displays when the ignition is on and any door is not completely closed.
Electronic Locking Differential 
Illuminates when using the electronic locking differential.
Engine Oil Pressure 
If it illuminates with the engine running, or when you are driving, this indicates a malfunction. Stop your vehicle as soon as it is safe to do so and switch off the engine. Check the engine oil level.
Note: Do not resume your journey if it illuminates despite the level being correct. Have the system checked by an authorized dealer immediately.
Exhaust Brake On
The exhaust brake indicator light illuminates when you switch the exhaust brake on.
Fasten Seatbelt 
Illuminates and a tone sounds to remind you to fasten your seatbelt.
High Beam
Illuminates when you switch on the high beam headlamps. It flashes when you use the headlamp flasher.
Hydromax
Illuminates to indicate normal hydromax booster reserve system activation when the engine is off and the service brake pedal is applied. This light may also illuminate momentarily if the engine is running and the driver turns the steering wheel fully in one direction while braking. If the light remains on while the engine is running, this indicates inadequate hydraulic booster pressure or reserve pump system failure. Stop the vehicle as soon as possible and seek service immediately by your authorized dealer
Illuminates when the fuel level is low or the fuel tank is nearly empty. Refuel as soon as possible.
Parking Brake Warning
Illuminates briefly when you switch the ignition to the on position (with the engine off). It also illuminates when you apply the parking brake. If the park brake lamp does not illuminate at these times, seek service immediately. Vehicles equipped with the power park parking brake option: If the park brake warning lamp begins to blink after setting the parking brake, this may indicate a failure in the parking brake system. Seek service from an authorized dealer immediately. Driving extended distances with the parking brake engaged can cause brake failure and the risk of personal injury.
Powertrain Malfunction/Reduced Power/Electronic Throttle Control
Illuminates in the event of a powertrain fault. Contact an authorized dealer as soon as possible.
Service Engine Soon
If it illuminates when the engine is running this indicates a malfunction. The On Board Diagnostics system has detected a malfunction of the vehicle emission control system.
If it flashes, engine misfire may be occurring. Increased exhaust gas temperatures could damage the catalytic converter or other vehicle components. Drive in a moderate fashion (avoid heavy acceleration and deceleration) and have your vehicle immediately serviced.
It illuminates when you switch the ignition on prior to engine start to check the bulb and to indicate whether your vehicle is ready for Inspection and Maintenance (I/M) testing.
Normally, it illuminates until the engine is cranked and automatically turns off if no malfunctions are present. However, if after 15 seconds it flashes eight times, this indicates that your vehicle is not ready for Inspection and Maintenance (I/M) testing.
Stability Control and Traction Control Indicator
Flashes during operation.
If it does not illuminate when you switch the ignition on, or remains on when the engine is running, this indicates a malfunction. Have your vehicle checked as soon as possible (Air brakes only).
Traction Control 
Flashes slowly when you disable traction control. It rapidly flashes during a traction control event (Hydraulic brakes only).
Illuminates when you switch the system off (Air brakes only).
Trailer Anti-Lock Brake System (ABS)
Illuminates briefly when you switch on the ignition, and only when a PLC trailer or a PLC diagnostic tool is connected. If the light fails to illuminate, remains on after you start the vehicle or continues to flash, have the system serviced immediately
Transmission Tow/Haul
Illuminates when you switch on the tow/haul feature. If the light flashes steadily, have the system serviced immediately, damage to the transmission could occur.
The Two Speed Axle indicator comes on when you switch the low axle range on.
Wait to Start
Illuminates when you switch the ignition on as part of the pre-start system. Wait until the wait to start indicator turns off before attempting to start vehicle.
WARNING: Do not use starting fluid, for example ether, in the air intake system. Such fluid could cause immediate explosive damage to the engine and possible personal injury.
Water in Fuel
Illuminates when the fuel filter/water separator has a significant quantity of water in it.
If the light illuminates when the engine is running, stop the vehicle as soon as safely possible, shut off the engine, then drain the fuel filter/water separator.
Allowing water to stay in the system could result in extensive damage to, or failure of, the fuel injection system.
WARNING: Do not drain the water-in-fuel separator while the engine is running. Failure to follow this warning may result in fire, serious injury, death or property damage.
AUDIBLE WARNINGS AND INDICATORS
Beltminder Warning
Sounds when a safety belt is unfastened in an occupied seat and your vehicle is moving.
Door Ajar
Sounds when a door is not fully closed and your vehicle is moving.
Headlamps On Warning Chime
Sounds when you remove the key from the ignition and open the driver’s door and you have left the headlamps or parking lamps on.
Key in Ignition Warning Chime
Sounds when you open the driver’s door and you have left the key in the ignition with it in the off or accessory position.
Parking Brake On Warning Chime
Sounds when you have left the parking brake on and drive your vehicle. If the warning chime remains on after you have released the parking brake, have the system checked by your authorized dealer immediately.
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