That light indicates a fault in your charging system, and it works by monitoring the voltage in the system. Any semi made today has a 12-volt electrical system. They used to have 24-volt systems (the extra 12 volts made it easier to crank a big engine) but now that powerful 12-volt starters have been invented, trucks are 12v. Which means the system thinks the voltage in it should be between 11 and 13 volts. If it sees a voltage outside that range in either direction, the light comes on.
Since the light comes on when you step on the fuel pedal, the voltage is too high. Too high voltage means your voltage regulator is shot...since it's in the alternator, you need to pull it, take it to an auto electric shop and get it rebuilt. More importantly, you need to get it done NOW - pumping 18v into a 12v electrical system fries things, and the cheapest part in the system is the alternator. You don't want to know what an engine computer on one of these rigs costs.
it means the light on a battery of a computer or cell phone
the battery light means that your battery is being charged properly. so let it light.
The battery light means your battery is low. You should go to a mechanics.
battery light flashing means the battery is not charging,check alternator fuel light flashing means very low or almost out of fuel.
It means it is almost outa' battery.
When the battery light is on. That means your charging system isn't working. You should have your system check. It will drain your battery.
That light doesn't mean that your battery needs to be replaced. It means that your battery is not being charged while the car is running. Have your alternator tested.
The reduced engine power light means that there is a problem with the battery or power system. It almost always means a battery connection issue.
It is not really a battery light. It is a charging system light. It is on because the system has malfunctioned. Normally this means the alternator is not working properly.
It means you need to charge the battery.
The red light means the battery is low.
the battery isn't charging as it should.