how to replace original brake light with LED? - Toyota Yaris Forums

eeeeeh · 10-21-2017, 02:57 AM

thanks @Justhandguns and @IllusionX. I have spare resistors lying around and don't think that helps with the LED brake lights. I just tested it and here are the results:

-- LED brake light on one side only, when I turn on the low beam, the LED would light up full-power. When I step on brake it would not make any brightness difference (so it is lit up).

-- If I turn off the low beam and step on brake, it would also go on full-power. BUT at the same time the low beam (and dash lights) would light up. This is why I think it is back-feeding power back to the low beam circuit, hence, my original hypothesis might be right where I'd need some diode to prevent this from happening.

-- I have also tested putting a resistor between brake and ground (LED brake light wires), which did nothing and arrived at the same result as above. I repeated the same test with resistor between low-beam and ground (LED brake light wires) and again, same result as above.

-- Previously when I replaced the indicator lights with LED I added the resistors in, and did not trigger any dash error lights.

Hmm.... more tests to be done.

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10-21-2017, 02:57 AM	#8
eeeeeh Drives: Yaris YR 2013 Join Date: Jan 2017 Location: Australia Posts: 21	thanks @Justhandguns and @IllusionX. I have spare resistors lying around and don't think that helps with the LED brake lights. I just tested it and here are the results: -- LED brake light on one side only, when I turn on the low beam, the LED would light up full-power. When I step on brake it would not make any brightness difference (so it is lit up). -- If I turn off the low beam and step on brake, it would also go on full-power. BUT at the same time the low beam (and dash lights) would light up. This is why I think it is back-feeding power back to the low beam circuit, hence, my original hypothesis might be right where I'd need some diode to prevent this from happening. -- I have also tested putting a resistor between brake and ground (LED brake light wires), which did nothing and arrived at the same result as above. I repeated the same test with resistor between low-beam and ground (LED brake light wires) and again, same result as above. -- Previously when I replaced the indicator lights with LED I added the resistors in, and did not trigger any dash error lights. Hmm.... more tests to be done.