Color of wireson radio and speakers on 1991

1998 Chevrolet Corvette Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: Orange
Radio Switched 12V+ Wire: Yellow
Radio Ground Wire: Black
Radio Illumination Wire: Gray
Radio Dimmer Wire: Brown
Radio Power Antenna Trigger Wire: Pink
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 4? Speakers
Front Speakers Location: Kick Panels
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: 6?
Rear Speakers Location: Rear Sides
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

Here are what the different colors do.1991 Ford F150 Truck Car Stereo Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Red or Black
Car Radio Illumination Wire: Blue/Red
Car Stereo Dimmer Wire: Orange/Black
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Green
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): White/Green
Right Front Speaker Negative Wire (-): Black/White
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Orange

New Yorker and Fifth Ave have different colors for RR speaker neg. Does either of these match up?

1991 Chrysler New Yorker Car Audio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Red
Car Radio Accessory Switched 12v+ Wire: Red/White
Car Radio Ground Wire: Black
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: Orange/White
Car Stereo Antenna Trigger Wire: Yellow
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 3 1/2?
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Green
Left Front Speaker Negative Wire (-): Green/Yellow
Right Front Speaker Positive Wire (+): Purple
Right Front Speaker Negative Wire (-): Purple/Yellow
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 (-): Brown/Yellow
Right Rear Speaker Positive Wire (+): Blue/Red
Right Rear Speaker Negative Wire (-): Blue/White

1991 Chrysler Fifth Avenue Car Radio Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Red
Car Radio Accessory Switched 12v+ Wire: Red/White
Car Radio Ground Wire: Black
Car Radio Illumination Wire: N/A
Car Stereo Dimmer Wire: Orange
Car Stereo Antenna Trigger Wire: Yellow
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: 3 1/2?
Car Audio Front Speakers Location: Dash
Left Front Speaker Positive Wire (+): Green
Left Front Speaker Negative Wire (-): Green/Yellow
Right Front Speaker Positive Wire (+): Purple
Right Front Speaker Negative Wire (-): Purple/Yellow
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 (-): Brown/Yellow
Right Rear Speaker Positive Wire (+): Blue/Red
Right Rear Speaker Negative Wire (-): Brown/Yellow

1991 Ford F150 Truck Car Stereo Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Red or Black
Car Radio Illumination Wire: Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Green
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): White/Green
Right Front Speaker Negative Wire (-): Black/White
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Orange

This should help you with more then just the constant power wire, good luck.

RECHECK THE WIRING TO SPEAKERS AND CHECK THE STERO IS COMPATIBLE TO WIRING.

the wires with black stripes are the minus the ones with red stripes are plus

1991 Ford Explorer XLT Radio and Speaker Wire Colors
Pulled out the stock radio and found two plugs on the back of it. One plug had 7 wires (Power, Dimmer, Amp etc.) and one had 8 (Speakers).
7 wire plug (I could see these wires immediately from the plug):
Car Radio Battery Constant 12v+ wire = Light Green w/ Yellow Stripe
Car Radio Ground Wire = Black
Car Radio Accessory Switched 12v+ wire = Yellow w/ Black Stripe
Car Radio Dimmer Wire = Light Blue w/ Red Stripe
Car Radio Illumination Wire = Orange w/ Black Stripe
?? Don't know ?? Red Wire (No power to wire Constant or Accessory)
Car Radio Amp Wire = Blue
8 Wire Plug (Wires were wrapped in a grey outer sleeve, had to cut sleeve to get to wires.):
Right Front:
White w/ Green Stripe (+)
Brown (no stripe) (-)
Right Rear:
Purple w/ White Stripe (+)
Light Blue (no stripe) (-)
Left Front:
Light Green (no stripe) (+)
White w/ Orange Stripe (-)
Left Rear:
Light Blue w/ Black Stripe (+)
Yellow (no stripe) (-)
Speaker Wires (found at the individual speakers in the doors)
Right Front:
White w/ Green Stripe (+)
Green w/ Orange Stripe (-)
Right Rear:
Orange w/ Red Stripe (+)
Black w/ White Stripe (-)
Left Front:
Orange w/ Green Stripe (+)
Blue w/ White Stripe (-)
Left Rear:
Red w/ Green Stripe (+)
Red w/ Blue Stripe (-)

here is the wire colors and what they do. it is from the factory electrical guide.

1991 Ford F150 Truck Car Stereo Wiring Schematic
Car Radio Battery Constant 12v+ Wire: Green/Yellow
Car Radio Accessory Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Red or Black
Car Radio Illumination Wire: Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Green
Left Front Speaker Negative Wire (-): Black/White
Right Front Speaker Positive Wire (+): White/Green
Right Front Speaker Negative Wire (-): Black/White
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Pink/Green
Left Rear Speaker Negative Wire (-): Pink/Blue
Right Rear Speaker Positive Wire (+): Pink/Blue
Right Rear Speaker Negative Wire (-): Green/Orange

here is what I found:
http://www.the12volt.com/installbay/stereodetail/715.html

Here is the complete discription of what each wire color does. Please rate this info.

1991 Honda Accord Car Stereo Radio Wiring Diagram
Radio Constant 12V+ Wire: White/Yellow
Radio Switched 12V+ Wire: Yellow/Red
Radio Ground Wire: Black
Radio Illumination Wire: Red/Black
Radio Dimmer Wire: N/A
Radio Power Antenna Trigger Wire: Yellow/White
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 6 1/2′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Blue/Green
Left Front Speaker Wire (-): Gray/Black
Right Front Speaker Wire (+): Red/Green
Right Front Speaker Wire (-): Brown/Black
Rear Speakers Size: 6 1/2′
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Blue/Yellow
Left Rear Speaker Wire (-): Gray/White
Right Rear Speaker Wire (+): Red/Yellow
Right Rear Speaker Wire (-): Brown/White