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The tail light/brake light bulb has two filaments. If one of the filaments is broken, you will get either only tail lights, or brake lights. If a new bulb doesn't work, then you have a broken wire or bad connection in your plug-in.

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โˆ™ 2004-10-07 21:24:03
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Q: What is the problem if you have tail lights but only one brake light?
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Brake lights don't work when the brake is pushed. Work with headlights on only.?

The brake lights and the tail lights are separate circuits. Check the brake light fuse, then check the brake light bulbs, then check the brake light switch.


Why does only lights on dash that works is check engine light and brake light work on a 1991 blazer?

i have the same problem i replaced the coolant temp sensor to get my check engine light to go off but it could be a number of things the brake light means you have a problem with the brake system but i have hared that the light sticks and is a common problem with blazers in the late eighties and early nineties models


Why does your tail lights only work when you press on the brake?

Are you saying your tail lights themselves do not work and only the brake lights work. If that is the case, check the fuse, and then check the tail light bulbs.


Why does the brake light not light up when you turn on the light but it light when you brake?

This is operating as intended. Brake lights are only activated when the brake pedal is pressed, irrespective of the other lights in use. It is a safety feature so vehicles behind are aware the brakes have been applied. They are separate from the tail lights so they still give a visual indication of braking whether the other lights are on or off.


What could be wrong with your car if the brake lights work when the lights are off but when the lights are turned on the passenger side tail lights and brake lights completely go out?

This is usually a grounding problem. Either an insufficient ground to the assy or a positive to ground problem. As you mention the brake lights work with the lights off, it will probably be related to a problem with the "running lights" system. As you mention only a problem with the passenger rear, I would check for a poor ground related to that light assy or possibly one of the bulbs' internal filaments in that assy touching each other. Or possibly a socket failure at that assy. Good Luck


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Does the light across the back of a Cadillac CTS lights up?

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Why would the brake lights on your 1994 Corvette not function except the center high one which works fine?

AnswerTry checking your fuse for your tail lights in your fuse box if that doesnt work try check for a short in your wiringAnswerI noticed on my 1990 did the same. Also found out it only happens when the TILT wheel is completely down. Try lifting the tilt wheel up and down with someone watching your brake lights. Have not pinned down the source in the column yet, but will keep looking!!!The brake light switch is probably the problem. My '91 had the opposite - the brake lights worked but the 3rd light did not. The brake light switch has 2 terminals - one for brake lights and one for the 3rd brake light. Replace the switch.


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Brake pedal turns on dash lights when depressed on a hyndai accent?

Have you upgraded any lights to LEDs? This answer can apply to any car with this problem but only if LED lights are used. This can be caused by LED 1157 tail/brake combo lights. The problem is that the tail and brake lights are not always as isolated as they should be. When the brake lights are powered on the tail light terminal becomes live. This voltage will power up the park light circuit ie. tail lights, front park lights and instrument panel. The "short" comes after the LED resistors in the 1157 therefore the leaked current is low and will not usually cause any problems unless you have LED's throughout the park light circuit, there is insufficient current to turn on standard light bulbs. Solution is a diode fitted in line on the tail light wires to the 1157s allowing current into the 1157 but not out.

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