Nissan Repair: 2001 Xterra Instrument illumination went out, illumination lights, eric nissan

Question
I recently replaced the stock head-unit(6cd/chgr) with an aftermarket deck. Everything audio-wise works fine, however, my illumination lights behind my instrument panel(speedometer, warning lamps, etc) won't come on anymore. All the gauges work and all the warning lamps come on, however, at night I can't see anything now. I checked all the fuses and they looked good visually. There were two wires that I didn't solder into my new wiring harness. One was yellow with a black stripe and the other was yellow with a red stripe. I couldn't find these in my Haynes manual-so I have no clue where they go or what they do. What could be my problem?

Answer
Eric,

Nissan uses a strange wiring system with a floating ground for the stereo.  Use the following wiring diagram to sort out the radio wires and your lights should work again.

12volts white/blue + ignition harness
Starter white/red + ignition harness
Second Starter white/green + ignition harness
Ignition black/red + ignition harness
Accessory white/black + ignition harness
Keysense black/red + ignition harness
Power Lock red - driver door module in door
Power Unlock lt. blue (double pulse) - driver door module in door
Lock Motor purple 5wi white plug, pin 30 at BCM
Unlock Motor yellow 5wi white plug, pin 23 at BCM
Disarm Defeat white/red 5wi white plug, pin 31 at BCM
Parking Lights+ red/blue + driver kick panel
Hazards green/red - brown plug, pin 61 at BCM
Turn Signal(L) green/white + white plug, pin 22 at BCM
Turn Signal(R) purple/white + white plug, pin 21 at BCM
Reverse Light lt. green + driver kick panel
Door Trigger white (L), pink (R) - white plug, pin 14, 10 at BCM
Dome Supervision comes on with unlock
Trunk/Hatch Pin red/white - white plug, pin 18 at BCM
Hood Pin lt. green/black - hood pin switch under hood
Trunk/Hatch Release pink - brown plug, pin 76 at BCM
Factory Alarm Arm arms with lock
Factory Alarm Disarm disarms with unlock
Disarm No Unlock single pulse power unlock wire
Tachometer NOT white/blue or black ac any ignition coil
Brake Wire pink/blue + brake pedal switch
Parking Brake purple - parking brake switch
Horn Trigger green/black - steering column


navi:
Speed Sense white 8P Unified Meter and A/C Amp, pin 26
The Unified Meter and A/C Amp is behind the A/C controls in the center console.

audio:

Radio 12v
yellow
+
radio harness


Radio Ground (chassis)
Radio Ignition lt. green + radio harness
Radio Illumination red/blue + radio harness
Factory Amp Turn-on green/yellow + radio harness
Power Antenna green/white + radio harness
LF Speaker +/- blue/red - black/white +,- radio harness
RF Speaker +/- yellow/red - red/white +,- radio harness
LR Speaker +/- lt. green/red - black/yellow +,- radio harness
RR Speaker +/- blue/orange - black/pink +,- radio harness