Well as the title says I'm having a pretty weird problem. Dynamic Stability Control, Anti-lock Breaks and Cruise Control shut off when I turn my headlights on, and I can not use CC with them on. When I turn them off again the DSC and ABS icons are still lit up, but now I can use CC again. Pressing the DSC button has no effect. This is a 2004 GT by the way.

I did install some new LED tail lights on Wednesday, is it even possible that that could that be the problem? I haven't put the resistors in yet so the blinkers are pretty fast but I can't imagine that would cause this.

 

Yes, could be the LEDs.

Some 12 volt leds use a current limiter that puts huge interference into the car's wiring.

ABS and DSC monitors are prolly getting confused by the new signals and shutting down.

Only way you'll know is to take 'em out.

 

They came with resistors that I haven't put in yet, I wonder if that would fix the problem?