You throw it at the ground.
When the tail light and break light are on the same bulb said bulb has 2 elements, one for the break and the other for the tail light, one element is burned out. Replace the bulb. If you've replaced the bulb, it might be the wiring. The holder for the bulb sometimes is at fault. They are $40.00 at the dealer, but at a pick a part or salvage yard they are $2.00.
If you break a light bulb in its socket, isolate the power (turn off the electric to that socket). Then use a needle nose pliers to get out rest of it with lamp off
the main reason for a light bulb to break is, the light bulb heats the tungstin wire. When the tungstin wire gets heated to much it breaks, causing thi light bulb to stop working.
Light bulb fuses when the filament inside gets overheated due to excess load, and melts, causing it to break.
A break in the ground wire on the light. More probably, a burned out bulb.
921
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One way to loosen a light bulb that is stuck in the fixture is to break the bulb. You can then use half of a potato to unscrew the bulb from the fixture. You can also make a loop with duct tape, adhere the middle of the loop to the light bulb. Use the two ends to twist the bulb out of the fixture.
check the lights could be a break light head light or running light is out
With all lights turned off,have someone step on the brake pedal. The bulb that illuminates is the break light bulb.
sounds like bad break light switch. your break pedal has a switch that turns on your break lights when you press on your breaks and off when you take your foot off the pedal.
50-Voltage