1997 Sentra No Dashboard, Climate Control, and gear lights

[sincoronasoyrey]

I am having a problem about 3 weeks ago I installed an aftermarket Kenwood radio in my 1997 Sentra ever since then my dashboard, climate control, and gear selector lights do night work. I have checked all fuses and connections and there is power going to each unit. There is also power going to the red/yellow and red/green wires that use to control the lights for the radio. I read in a forum for a 200sx that you can ground the red/yellow wire and check the TCU (Timing Control Unit) but I don't think it has a TCU. What can I do?!