Third upper brake light works, bottom two brake lights do not work?

Hi,

If the third light works but the others don't, either we lost power to the two on the sides or ground. However, the third brake light has common ground with the others, so again it should be okay.

The power to all brake lights comes from the same place. So, if the third works, which is the first in the series, the others should work unless the splice has failed.

If you look below, I attached a wiring schematic of the brake lights. Note the light green wire goes to each of the three bulbs. That is the power supply wire for the brake lights which is supplied directly from the brake light switch under the dash. The first light powered is the third brake light and then note the dashed line going to the other two lights. The dashed lines indicate they are part of the same circuit.

Here is what I need you to do. Check the light green wires on each side for power when the brake pedal is depressed, and the third brake light is on. If there is no power, remove the third brake light and check the light green wire to make sure where it's spliced, everything is good.

If there is power, then you need to confirm the black wire has continuity to ground. In this case, if the turn signals work and parking lights work, the ground is good and doesn't need to be checked.

My first suspect is the splice at the 3rd brake light has failed. When you check the light green wires for power, if they do have it, my next suspect is the dual element bulb is bad or the light sockets.

Let me know what you find.

Take care,

Joe

See pics below.

It turned out to be the dual element in both light bulbs. Thank you for your assistance. I did not think both would have gone out at the same time.

Mike,

When one goes, the other is usually not far behind. Chances are one burned out and then shortly thereafter, the other one went before you noticed.

Regardless, I'm glad to hear they are working, and thank you for the update.

Take care and please feel free to come back anytime in the future. You are always welcome here.

Joe

Thank you for your assistance in resolving this issue!

So, I’m having a similar problem. But Honda said it was the driver's side floor harness. A pin came out last night. Honda the lights working, but it didn’t hold. Any recommendations? I was going to take the seat out and just connect it myself.

This is what the tech had to say. It’s a really expensive fix.

Hi Mark,

I believe I responded to this question in a different post. Let me know if you received it.

Joe

My car is a Honda Accord touring 2018. Is all wiring the same?

Please start a new question for the newer car.

Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken