Question about 2001 Hyundai Elantra

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01 Hyundai Elantra - Cruise Control Doesn't Work w/ Headlights On

I have a 01 Hyundai Elantra. A month or two ago, I noticed two things: 1) When I step on the brake, the dashboard lights up as if I have turned on the running lights, though a bit dimmer, 2) The cruise control won't engage if the running lights are turned on and will actually disengage if I turn the running lights on while cruising. I suspect that there is a connection between the two issues, because the cruise control is behaving as if the brakes have been depressed whenever the running lights are turned on. I don't have an electrical schematic, so I am not sure where to look for a connection other than the tail lights. What would cause this to occur? Thanks.

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  • barry_chase Sep 21, 2009

    Thanks for the response.

    The problem was resolved by replacing a blown brake light.

  • Richard Scordino May 11, 2010

    Funny...that's only the second time in over thirty years I ever ran into that. But it can really mess with your logic!!! It acts like a crossed wire where there isn't one. (drove me crazy enough to remember it clearly) Glad it's working!!

  • Richard Scordino May 11, 2010

    possible body control module or bad dash ground

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I had same problem (cruise control/dashboard lights) for the past month with my 2000 Elantra. Replace the tail lights bulbs - my problem was caused by a problem with the double filament within the bulb. Essententially, there was a short when I turned on the lights or hit the brakes.

I did this last night and everything is working properly now.

Posted on Sep 18, 2009

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1 Answer

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