Dont know what blue and pink wiresare for on the plug which connects to the back of the stereo

2000 Chevrolet Impala Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Orange
Car Radio Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Antenna Trigger: White
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

First thing you will need to do is to buy a wire adapter for your specific make & year of car. This interfaces the stock wiring plug allowing you to connect the wires from the headunit to the wires of the plug.

Here is a color coding explanation for the wires on your Alpine Deck:

P o w e r Memory (+12v Constant) Yellow Ignition (+12v Switched) Red Ground (-) Black Dimmer Pink/White (Alpine only) Power Antenna Blue Amplifier Turn-on Blue/White Phone Mute Light Blue (Sony only) S p e a k e r s Right Front (+) Gray Right Front (-) Gray/Black Left Front (+) White Left Front (-) White/Black Right Rear (+) Violet Right Rear (-) Violet/Black Left Rear (+) Green Left Rear (-) Green/Black

Give this a try it should get you close:
http://www.protrainz.com/images/97expjbl.png

Here are the stereo wiring colors.

1995-97 Nissan Maxima Stereo Wiring Constant 12V+ Pink/Blue Switched 12V+ Blue/Black Ground Vehicle Chassis Illumination Red/Blue Dimmer Red/Orange Antenna Trigger Black/Red Antenna Right Rear Front Speakers 6 1/2" Doors Left Front (+) Blue/White Left Front (-) Blue/Yellow Right Front (+) Brown Right Front (-) Brown/White Rear Speakers 6 1/2" Rear Deck Left Rear (+) Red Left Rear (-) Green Right Rear (+) Blue Right Rear (-) Pink

1998 Chevrolet Malibu Car Stereo Wiring Diagram

Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger Wire: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4? x 6?
Car Audio Front Speakers Location: Doors
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: 6? x 9?
Car Audio Rear Speakers Location: Rear Deck
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue

Hope this helps (remember to rate this).

fun fun fun.
1990 Toyota 4Runner Car Stereo Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Blue/Yellow or Blue/Black
Car Radio Accessory Switched 12v+ Wire: Gray
Car Radio Ground Wire: Brown
Car Radio Illumination Wire: Green
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 4′
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Purple
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Blue
Car Audio Rear Speakers Size: 5 1/4′
Car Audio Rear Speakers Location: Side Panels
Left Rear Speaker Positive Wire (+): Black
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Red
Right Rear Speaker Negative Wire (-): White

You should really invest in a $15 wire harness so you do not have to cut the factory plug.
Instructions will be in the package - but in the event you dont have a factory plug due to theft - here is the vehicle's wiring color codes...

Car Radio Battery Constant 12v+ Wire: Light Green/Pink
Car Radio Accessory Switched 12v+ Wire: Black/Violet
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Blue

Left Front Speaker Positive Wire (+): Light Blue/White
Left Front Speaker Negative Wire (-): Orange/Light Green
Right Front Speaker Positive Wire (+): Dark Green
Right Front Speaker Negative Wire (-): White/Light Green

Left Rear Speaker Positive Wire (+): Tan/Yellow
Left Rear Speaker Negative Wire (-): Gray/Light Blue
Right Rear Speaker Positive Wire (+): Brown/Pink
Right Rear Speaker Negative Wire (-): Orange/Red

Thanks for using FixYa!!

Left Front Speaker(+) ORANGE/L GREEN ; Size: Left Front Speaker(-) L BLUE/WHITE ; Size: Right Front Speaker(+) WHITE/L GREEN ; Size: Right Front Speaker(-) D GREEN/ORANGE ; Size: Left Rear Speaker(+) PINK/L GREEN ; Size: Left Rear Speaker(-) TAN/YELLOW ; Size: Right Rear Speaker(+) PINK/L BLUE ; Size: Right Rear Speaker(-) BROWN/PINK

1995 Nissan Sentra Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Pink
Car Radio Switched 12v+ Wire: Blue
Car Radio Ground Wire: Chassis
Car Radio Illumination Wire: Red/Blue
Car Stereo Dimmer Wire: Red/Yellow
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Blue
Right Front Speaker Positive Wire (+): White
Right Front Speaker Negative Wire (-): Black
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Light Green
Left Rear Speaker Negative Wire (-): Violet
Right Rear Speaker Positive Wire (+): Blue
Right Rear Speaker Negative Wire (-): Pink

hi, first you are better off to purchase a conversion plug from a stereo outlet (so that you arn't cutting the standard plug off)
the colours should be
orange/pink = L/F Speaker
orange/black = L/F Speaker
grey/green = R/F speaker
grey/black = R/F speaker
pink/black = L/R speaker
pink/green = L/R speaker
blue/black = R/R speaker
blue/red= R/R speaker
blue/white = switched wire
black = earth
green/yellow = hot wire
these are ef but should be the same
happy motoring