2014 Toyota Corolla LE
I’ve read online that this is probably a ground issue if not a fuse. Well it’s not the fuse and I’ve found a few grounds but does anyone know where the ground for the tail lights is? I’d appreciate any help. Thanks
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I’m assuming you’ve tried changing the bulbs? The brake/tail light is a dual filament bulb. Just cause one function works doesn’t mean the bulb is good. I would start there if you haven’t already.
You will need to find the black wire on the harness connector going to each tail lamp, learn how to test the continuity of the ground with a multimeter, then if it’s bad, either trace the wiring harness down to the local ground, or, if the ground is good - you may have a problem with the multifunction switch not communicating and telling the rear running lights to engage
in the 2013 which i have a diagram handy for…
there is a tail light relay… that is turned on by turning on the headlights…
fuses…
7.5Amp panel fuse… should have power to both sides with the headlights on…
10Amp Tail light fuse. also should have power on both sides of the fuse with the headlights on… slightly different between TMC made and NON TYC made models… got to ask the toyota techs what that means… that car is built around the world…
use your owners manual to find the location of the 2 fuses…
use a test light or circuit tester to see if the fuses are good and if the relay is supplying them voltage with the headlights on…