I have been doing alot of electiral stuff lately. New Leds in gauge cluster and HVAC, new gauges, Headunit, Eman. Anyways.. When i turn my headlight switch on, the Hvac doesnt lite up anymore.. any ideas?

 

You broke something?
shrugs.

 

negative.. i have two HVAC and both do this.

 

and the normal lights the run the HVAC when the headlights arent on, still work.

 

Did you by chance hit the light **** on the dash and turn it down so they do not light up with headlights,dimmer switch.......I know I have done it.

 

that was the first thing i checked, cause honestly ive done that before too haha

 

thank God I am not alone.......took my wife to figure out what I had done......I was very shamed by her......lol

 

lol i took out my guage cluster to wire a boost guage to the headlight switch..and when i put it back in and turned it one, it was all black, but my boost guage worked.. took me a few minutes then i laughed about it haha

 

any other ideas?

 

err... what year is your car?

 

2006

 

check ur fuse. it happen to me when i had led lights. i replace it like twice.

 

okay

 

Arghh! I've got the same problem, too. The funny thing is, the light for the hazard switch still turns on, but none of the other lights on the ac control board turn on. The lights for the dash (tach, speedometer, etc) work fine.

This happened after I unplugged the ac control board to access my stereo. I had done this a few times before, and had no problems, but now for some reason it started doing this. I wonder if it has something to do with the 'auto-on' feature of the headlights. You know how you can leave the switch on, then open your door and the lights turn off, then when you start the car, they turn back on? Maybe this confused the microcontroller on the ac board after unplugging it.

Steve, was it a bad fuse?