Question about 2006 Hyundai Elantra
Brake light works when car is running. It doesn't work when just the key is turned. Any thoughts?
Posted by Anonymous on
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Posted on Jan 02, 2017
YES -- process of elimination. Obviously there's a short circuit in the Brake/Headlight circuits - right? Blown fuse(s) is/are evident of this -- would you agree? Which fuse(s) is/are blowing? An analysis tells you that the only time a fuse blows is when the headlamps are turned on -- correct? Otherwise, brake lights work normally -- right? OK. Head lamps have relays which turn them on. Here's a wiring diagram of the 2000 Hyundai Sonata (NOT the Jeep Grand Cherokee)
It would appear the problem is with one or more bulbs or sockets or both. As you many notice, there are no connections between the headlamps and brake lamps except the parking lamps (which share the bulbs/sockets)
When the headlamps are turned on, so does the tail lamp relay. As you can see, these bulbs/sockets are 'DUAL' filament to ground (series-parallel circuit). Just a guess here - the short is in one of the lower rear brake/parking lamp bulbs/sockets.... just a guess.
Posted on Jun 20, 2009
SOURCE: Hyundai Excel brake lights stay
Mine does the same and I am currently getting it fixed.
Basically the brake pedal, when not depressed, is placed against a switch which turns off the brake light (even when the car is not on). There is a rubber disc that connects the two, which in my car has disintegrated into bits. If I stuff things between the two (like the crumbling bits of the rubber disc) the brake lights turn off, but as soon as I use the brakes again, the bit I stuffed in falls out. You can look at it yourself, but it is in a difficult spot around the top of the brake pedal.
At this stage I am been advised that I must replace the whole switch, but I am contemplating finding an improvised solution (like tap washers) as it seems a simple problem to fix.
Posted on Nov 30, 2010
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