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The brake lights still do not turn on

Tiny
ARYANNASMOM
  • MEMBER
  • 2013 HYUNDAI SONATA
  • AUTOMATIC
  • 81,000 MILES
I replaced the brake light switch due to the car dealership telling me it had to be replaced. The brake lights still do not turn on when pressing the pedal. Also, my ESC light stays on and cruise control does not work. The fuses seem good as well. What is the next thing to check?
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Friday, November 17th, 2017 AT 4:35 AM

3 Replies

Tiny
PATENTED_REPAIR_PRO
  • MECHANIC
  • 1,853 POSTS
There are actually three fuses to check, the "stop lamp" of course and the "ECU 4" both in the e/r fuse and relay box, plus the "pdm 2" in the I/p fuse box.
There is also a stop signal relay that could as well be bad if all those fuses are okay and have power.
Here is the brake lamp wiring diagram. I see the ESC module in that diagram, so when you find out what is causing the stop lamps not to work, I suspect you will also fix that ESC problem as well and most likely get the cruise working again as well, because it too is related to the stop lamp switch.
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Monday, March 22nd, 2021 AT 10:45 AM
Tiny
ARYANNASMOM
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One of the fuses I did not check before was actually blown so I replaced it and will see if that works when I get to work.
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Monday, March 22nd, 2021 AT 10:45 AM
Tiny
ARYANNASMOM
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That was it. Thanks for the help, great site BTW.
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Monday, March 22nd, 2021 AT 10:45 AM

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