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Modern automobiles have brake pad thickness sensors. My 2004 Forester has one on the rear and one on the front. The sensors are mounted on one brake pad each. When the brake pad wears down to a predetermined thickness the brake rotor wears the coating off of the sensor and provides the contact surface so that the connection is made between the two wires ( on some cars) or just provides ground on others. Now the brake indicator light comes on. The thickness of the pad where this happens is set so that you have some time to react before the metal backing plate of the brake pad comes into contact with the brake rotor and destroys it.
The battery light means that a low voltage condition exists at the battery. Not in the battery, the light does not come on if your battery fails, it comes on because your altenator is not putting out enough voltage to power the vehicle. This could be altenator failure on the belt driving it has a problem. Loose or even broken. When the voltage falls below 7 volts your ignition system will fail and the engine will stop running not to mention that the electric starter won't function. Hope this helps.
What else can I help you with?
Battery warning light on chrysler 300?
It is important to pay attention to the warning lights on the dashboard. The Battery warning light turns on when there the battery of a car is having a problem.
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Normally this is caused by a defective brake light switch or one that is out of adjustment.
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broken belt
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The 1998 VW beetle is equipped with several dashboard warning lights. The warning lights include; high water temperature, wall oil pressure, ABS braking system failure, and low battery.
Where is there a fuse or relay to replace in a 1998 Subaru Forester S when both tail lights don't work?
hi, behind the coin tray on the drivers side, you have to pull it out
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on most vehicles you can reset warning lights by simply unconnected a battery cable
Iveco warning lights?
The low air warning light is in indication the air compressor is not working or can't keep up with replenishing the air system. The red battery warning light is an indication the battery is not charging properly.
What do the warning lights mean on 2003 Ford F-350?
The warning lights in the 2003 F-350 indicate whether or not the airbag is turned on, the oil pressure, and the battery charge. Other warning lights include a hot engine light and a low fuel light.
