'09 Package 2. Pulled the factory radio and installed my Pioneer AVIC GPS-DVD etc. from my previous car. No real problems with the install. Used the 68 ohm resistor for the climate control. Works fine. EXCEPT.......no illumination on the steering wheel. I don't expect the audio buttons to work but..I would like the heater A/C to be illuminated at night. Wonder how this can be corrected??? Thanks, Don
The buttons on the steering wheel are illuminated, only very dim. In fact you probably can't see them unless on a dark road when driving. There is no way to change the brightness.
I believe the OP is saying a side-effect of his mods killed steering illumination. I'd suggest downloading wiring diagrams from techinfo.toyota.com to see if there was a dependency on lighting. ($10/day)