* It about a difference in electrical flow in the left and the right circuit.
* If you replace your bulbs per one instead of per pair then there is mostly a difference in electrical resistance in both bulbs. If the difference is to great the warning light comes up.
* If you lights are always from te same age then it could be that there is corrosion in one of the the bulb holders is.
If the warning lights comes up when you use the break then it is obviously that one of the arguments above is valid. Start with replacing the bulbs and to check if there is corrosion. Keep the break on and sligtly move the bulbs with a left/right twitch. This will refresh the contact. If the light goes of it was a bad contact due to erosion.
JH
To replace the rear brakes on a Volvo 850 you must first remove the old brakes. Then connect all of the wirings to the new brakes including the brake fluid line and the connection for the brake pads.
Because the e brake is hooked into your braking system and that system has a problem.
If your brake warning light is on, and for reasons that you are not aware of, you should NOT be driving this vehicle. If you know what is causing the brake warning light to come on, have remedied the problem, but the warning still persists, then you will have to take your car to a shop that is equipped for working on these brakes. And if the car is equipped with traction control/anti-lock brakes, the system is a lot more sophisticated, and near impossible for the home mechanic to work on anymore.
My 94 940 does the same thing. One or more of the bulb contacts is dirty or not making strong enough contact in the socket.
It means there is brake problem somewhere, maybe the back brakes.
Take you car in to a mechanic and have the brakes checked.
It should turn off, if all of the brake pad sensors are working. You might have a damaged sensor. Each sensor costs around $13.00
There is a problem with the brake system, and the light is a warning for you to have it checked by a pro mechanic. Brakes are very important right? In my experience it was a cable that runs to one of the front wheels, it cost me $100 to have it fixed at a shop. It does not harm anything with the light on, it just means you do not have anti lock brakes working.
The brake pad squealers are warning you to have the brakes serviced soon.
If your vehicle has separate dash panel warning lights for brakes and emergency brakes, then the e-brake light being on while not engaged may indicate that the e-brake switch may be maladjusted or faulty. If the brake warning light is on, it may indicate a brake fluid leak, or in some cases, low brake fluid levels in the reservoir. If your vehicle has a shared warning light for e-brake and brake warning, all causes listed above could apply.
The good news is the brake lights still appear to work even when this warning is displayed. Does anyone know if the brake lights are at risk of not coming on when you hit the brakes?
First, please understand that rear brakes do not work as hard as front brakes. The ratio of working is 60% front brakes and 40% rear brakes. Therefore, they do not wear out as quickly. Is this your observation and reason for asking the question? Second, if your rear brakes really are not working, you will experience a longer distance to come to a complete stop. Are you experiencing this? If so, then you really do have a problem with your rear brakes. You will have to check that the brake fluid is flushed (old brake fluid gathers moisture from the air and does not work as well) and you will have to check to see if any of the rear brake parts are "frozen" -stuck in place so that they do not squeeze the brake drum or disk. Please let me know how it goes. Your colleague in New Jersey