Electrical issues after Kenwood install

Hello everyone. I have installed a Kenwood double-din GPS head unit in my 2007 Tacoma and now have some issues presenting themselves. My odometer backlight flickers. Also, my power windows sometimes fail to function. From what I can gather on various forums, this is an issue with the illumination/dimmer functions or possibly a burned out rheostat. I have a new rheostat available to me, but I don't want to put it in and burn out another one. What is the proper way to wire up the illumination and dimmer wires? Out of all of the topics I have read, no one has given a clear description of how to wire these properly to avoid the electrical issues being faced by so many installers. Thanks for any help!

 

I went ahead and disconnected the illumination/dimmer wire and still had flickering issues on the odometer. Then I swapped out the rheostat and everything seems fine. *Fingers crossed that the odometer and windows continue to function properly* Unless someone has any ideas on how to properly get the dimming feature working with a Kenwood unit (DNX890HD), I'll just set the brightness to a suitable setting for daytime/nighttime and leave it.

 

Yeah, bad idea to connect the dimmer/illumination wire. IIRC, I read somewhere most aftermarket stereo dimmers operate at a different voltage than most stock illumination. So when you connect the two, all sorts of chaos and electrical issues can ensue. It very well could have even fried your rheostat.

 

I used a harness from Taco tunes to wire up my JVC / Kenwood double din . Using the harness avoided cutting any factory wiring as Taco Tunes supplied the proper connectors for each individual factory plug . No issues with the dimming .
Here is my write up
https://www.tacomaworld.com/threads...ab-2010-with-pics-and-prices-write-up.364009/

 

When your windows didn't roll up, what eventually causes them to do so? Mine just started intermittently refusing to go up...