Question about 2004 Kia Optima

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2004 kia optima,break lights stay on,taillights will not come on,bulbs are ok

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It sounds as if your brake light switch is bad, or, your brake pedal return spring isn't pulling the pedal back towards the seat.

First, just pull up on the brake pedal, opposite direction of when you are applying them & see if the lights go off. If yes, you'll need a new return spring. If not, then usually the switch mounted up above the pedal is defective & needs to be replaced.

I believe once that is corrected, the lights should work properly if your parking lights are working, as they both use the same circuit. If not, you'll have to do some testing of those wires & backtrack to the light switch.

The Brake light switch also can have the cruise control switch & other controls associated with it but not always, depending on the specific Model & Year & other options so testing it could require a wiring diagram, I've included a link that will give you the wiring colors for the brake light switch itself. Testing the wiring is the only way to determine any other condition that would be causing that to happen.

Here's the link for the wiring:
http://www.commandocaralarms.com/wiring/2003-2005/Kia/Optima/893.html

It shows the brake switch wires as GREEN.
Good Luck.

Posted on Feb 08, 2010

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Where is the brake switch in a 2004 kia optima located

Posted on Jun 09, 2010

  • aanderson357 Jun 28, 2011

    This helpful due to the fact of identifying where the switch was located. Once I looked at it, the nut holding the small release button (tab) in place was loose and the small metal piece it rest against was gone. I used a little crazy glue and a penny so the tab could have something to push against and then I tightened the nut up with my hand. I have a 2002, and didn't want to spend any unnecessary money. Everything works fine now...

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