No brake lights are coming on

DOMINICK CARLSON

MEMBER
2011 HYUNDAI ELANTRA
1.6L
4 CYL
2WD
AUTOMATIC
115,000 MILES

I've replaced the stop light switch and replaced fuses per another 2CarPros question (Stop lamp, ECU 4 and PDM2). I'm just trying to see if anyone has any more ideas.

Tuesday, July 23rd, 2019 AT 1:38 PM

3 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

Sometimes people get stuck on the power side of a circuit, because let's face it, we think of electrical power that operates things, but the power side of a circuit is only half of the circuit. For a circuit to be complete and allow the flow of electricity, it has to have a path back to the ground, or negative battery terminal in a vehicle. This could be a problem with Ground GM01, which is on the top left of the dash panel. Please check this Ground and make sure that it is clean, tight, free of corrosion, and making good metal to metal contact. Get back to us with what you are able to find out. I have also included in the diagrams down below the wiring diagrams for your brake light circuits.

Thanks,
Alex
2CarPros

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Tuesday, July 23rd, 2019 AT 4:01 PM

DOMINICK CARLSON

MEMBER
2 POSTS

Thank you for the answer. This may sound like a stupid question but where would I find this ground? I found one coming off the battery and another one coming off the engine itself. But I don't see what appears to be the ground for the electrical components.

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Saturday, July 27th, 2019 AT 11:15 AM

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello again,

That is not a stupid question. This ground can be found on left top dash panel. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

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Saturday, July 27th, 2019 AT 1:31 PM