My brake light stays on at certain time?

PG KHAIRIL QAYYIZ

MEMBER
2017 TOYOTA VIOS
1.0L
3 CYL
2WD
AUTOMATIC
80,000 MILES

I'm actually using Perodua Axia or similar to Toyota Agya or Daihatsu Ayla.

I would like to know what the problem with my brake light is because there are times where the brake lights will stay on. And if I plug out the brake switch and replug it again, the brake light is back to normal. But when I drive after a few km, the brake will will stays on again until I unplug and replug the brake switch. But there times also where when I replug the brake switch, the brake light will stay on. I have change the brake switch but still same issue. I also have tested the fuse but there are current running. The bulbs are all fine as well And all the pedal works fine.

I would like to know what is the problem of this. Is it wiring problem?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

There is a stop lamp relay located under the hood on the left side of the engine compartment. If that doesn't work, I would run a CAN scan on it because it sounds like the main body ECU (BCM) is starting to fail. Here are the brake light wiring diagrams so you can see how the system works. I also included how to change out the BCM as well. You can get a preprogrammed unit by searching Google or Ebay. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)

My brake light stays on at certain time?

1 Reply

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