I was in the process of changing all my interior lighting from stock to LED.
They worked for a bit, but as i was finishing up all of them stopped working at once including the trunk inside light.
a check engine light also came on which didnt make sense to me, my fogs stopped working, and i cant use the homelink.
Now the check engine light is gone, and my fogs work, but some dash lights (AC) dont work, along with all my interior lighting not working.
please help?

 

Sounds like a couple of fuses blew check all your work and replace the burned fuses with the same amperage rating. Theres fuses under the hood and on the driver side panel that relate to this issue but check them all.

 

You blew out a fuse.. This little guy has been a problem solver for me for Years:



Pretty cheap:
http://www.ebay.com/itm/Littelfuse-L...-/271369040354


You can also found it on Autozone dunno for how much but its common! Check that it has those 3 posts because you will need them! Those are for ATO (Standard Size Fuses) and MINI (TL small Fuses).

 

I checked the fuses and they were all good...

 

Are you certain that all fuses are good under the hood, drivers side panel and passenger side ? Id say remove all the LEDs may have a shorted one.

I can take a guess, Maybe the Multiplex control unit is in fail safe mode.
Try removing the negative battery cable for about 5 minutes then put it back, see if helps. Now beware it will reset everything so have your radio code or else you wont be able to use it.

 

I'll try the battery thing tomorrow and I'll post on if it works or not

 

You have a blown fuse somewhere for sure.