Looks similar to 02 but here are some notes on the 03 Maxima

12V Blu + Ignition Harness
Starter Blk/Red + Ignition Harness
2nd Starter Blk/Wht + Ignition Harness
Ignition Blk/Yel + Ignition Harness
2nd Ignition Red *1 + Ignition Harness
Accessory Wht/Blu + Ignition Harness
2nd Accessory Red *2 + Ignition Harness
Parking Lights Red/Grn Top of fuse box
Brake Wire Red/Green DKP
NOTES: This vehicle has an immobilizer system, used DEI 555U to interface
with it.

*1 Smaller of two
*2 Larger of two

Here's 02 for reference.

ITEM | WIRE COLOR |POL| WIRE LOCATION
12V|blue |+ |ignition harness
STARTER|black/red |+ |ignition harness
SECOND STARTER|black/white |+ |ignition harness
IGNITION|black/yellow |+ |ignition harness
ACCESSORY|red |+ |ignition harness
SECOND ACCESSORY|white/blue |+ |ignition harness
POWER LOCK|orange/black *8 |- |driver door module
POWER UNLOCK|orange/blue *8 |- |driver door module
LOCK MOTOR|gray | |pin 54 at SECU *1
UNLOCK MOTOR|white/black | |pin 55 at SECU *1
DISARM DEFEAT|green/yellow | |pin 56 at SECU *1
PARKING LIGHTS +|red/blue | |driver kick panel *2
PARKING LIGHTS -|lt. blue | |headlight switch
HEADLIGHTS|pink |- |headlight relay *7
DOOR TRIGGER|*3 | |SECU *1
DOME SUPERVISION|use door trigger | |
TRUNK/HATCH PIN|purple/yellow |- |pin 13 at SECU *1
HOOD PIN|yellow/red |- |pin 6 at SECU *1
TRNK/HTCH RELEASE|blue |*4 |pin 16 at SECU *1
FCTRY ALARM ARM|arms with lock | |
FCTRY ALRM DISARM|disarms with unlock | |
TACHOMETER|white/green | |instrument cluster *5
SPEED SENSE|pink/blue | |instrument cluster *6
BRAKE WIRE|red/green |+ |brake switch or drivers kick
HORN TRIGGER|green/white |- |steering column
WIPERS|blue(L), blu/blk(H) |- |steering column
LF WINDOW UP/DN|blue - green |A |drivers window switch
RF WINDOW UP/DN|blue - green |A |RF window switch
LR WINDOW UP/DN|yellow - red |A |drivers kick panel
RR WINDOW UP/DN|grn/wht - green |A |drivers kick panel
SUN RF OPN/CLOSE|not recommended | |
RADIO 12V|yellow |+ |at radio
RADIO SWITCH|purple |+ |at radio
RADIO ILLUMINATE|red/white |+ |at radio
POWER ANTENNA|green/white |+ |at radio
LF SPEAKER|blu/wht - blu/yel | |at radio or speaker
RF SPEAKER|brown - brn/wht | |at radio or speaker
LR SPEAKER|lt. grn - blk/yel | |at radio or speaker
RR SPEAKER|blue - pink | |at radio or speaker
NOTE: This vehicle has an immobilizer system that needs to be bypassed
during remote start operation. Use DEI part number 555U.
*1 The SECU (Smart Entrance Control Unit) is located to the passengers side
of the steering column.
*2 Can also find red/green or red/yellow at fuse box.
*3 Find lt. green for the drivers door in pin 1, red/blue for the passenger
front door in pin 2, and red/white for the rear doors in pin 3. Use all 3
wires and diode isolate each.
*4 Requires a high-current ground for activation.
*5 Located on the rear of the instrument cluster in the white plug. Do not
start the car with the cluster unplugged. Can also find the white/green at
the ECM located in the front of the center console on the transmission hump.
The wiring is easily reached by removing the panel just to the front of the
center console on the passenger side. DO NOT UNPLUG THE ECM.
*6 Located on the rear of the instrument cluster in the 20 pin brown plug.
Do not start the car with the cluster unplugged. Can also find the wire at
the ECM.
*7 The headlight relay is in the relay box under the hood.
*8 Meter these wires while turning the key in the driver door. Unlock
requires a double pulse.

ign coils: yellow/red, blue/red, purple/white, green/red, gray, gray/red,
common is red and black

injectors: red/black, red/yellow, blue/white, red/white, red/blue,
purple/red, common is red

reverse light green/white(+) DKP
hazard pink(-) SECU pin 7
key sense black/red(+) ign harness, SECU pin 25
trunk key cyl green/black(-) SECU pin 12

parking lights (+) are located high on top of the fuse box in a 7 pin white
plug.

FAA/lock - blue(-) located in low in the drivers door towards the
rear FAD/unlock - yellow (-) same location but requires
double pulse

horn red at steering column (-)

fuel door release yel/red (high current -) drivers running board

trunk pin purple/white -

bose amp is on rear deck