I already searched can't quite figure this one out:

So i did the dual button mod and everything on my JDM (2006 Gx) and installed the F90bt, JDM a/c controller worked fine, F90bt worked as well.

I decided to upgrade to the DNX8120, so I rewired the metra 7551 harness to the kenwood harnesses, etc, and I installed it into the JDM bracket and with the A/C controller.

Now, the A/C controller is NOT working (kenwood works fine): it's stuck at 75 degrees both sides with the driver's side pointing at the feet... NONE of the JDM buttons do anything except the defroster -- and i can hear the relay clicking in the background.

Also -- the lights on the JDM will light up just fine --

Anyone know why this is happening?

Oh, I put all my stock stuff back in (thinking i fried something big) and everything works flawlessly -- factory stereo, factory A/C controller.. everything works fine..

help!

 

Ok -- so i fried my first AC Controller (had Grubbs overnight me a new one -- had to shell out another $200)

DO NOT DO WHAT I DID .. i'm a complete idiot, i forgot to disconnect the negative battery terminal prior to my installation and i basically zapped the board when i plugged it back in.

ALWAYS ALWAYS ALWAYS TAKE THAT TERMINAL OFF! then do yer electrical work -- then reconnect.

Thanks for listening.

 

did you have the car on when you plugged it back in?
I've installed probably thousands of radios without disconnecting the battery.

 

Sadly, yes... I think it was in the ignition position ...

 

If you removed the plastic panel under the steering wheel, make sure the cabin temperature sensor is plugged in.