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In modern automobiles' 12V systems the positive is an isolated system and the negative uses the vehicle's chassis as the conductor. Since DC voltage is a two wire system there is no such thing as a ground per se. Any grounding that would be required would be referencing the negative terminal anyway. So you could ground anywhere there is bare metal in the car.
Most aftermarket cd players have the following wiring diagrams (+)Red..............12v ignition
(+)Yellow...........12v battery (Memory) Constant Hot
(-)Black............12v Ground
(+)Blue.............12v Power antenna
(+)Blue/white.......12v Remote turn on
Orange...........Dashlight/dimmer
Orange/white.....Dashlight/dimmer
Orange/black.....Dashlight/dimmer
(+)White............Front left positive
(-)White/black......Front left negative
(+)Grey.............Front right positive
(-)Grey/black.......Front right negative
(+)Green............Rear left positive
(-)Green/black......Rear left negative
(+)Purple...........Rear right positive
(-)Purple/black.....Rear right negative
red = 12v ignition/acc yellow= 12v battery/memory black = ground blue = power antenna blue/white = amp turn on black/white = amp ground orange = illumination orange/white = dimmer (+) orange/black = dimmer (-) brown = mute phone speakers--- grey = right front positive grey/black = right front negative white = left front positive white/black = left front negative violet = right rear positive violet/black = right rear negative white = left front positive white/black = left front negative green = left rear positive green/black = left rear negative
2000 Jeep Grand Cherokee Stereo Wiring
Constant 12V+
Red/White
Switched 12V+
White/Red
Ground
Black
Illumination
n/a
Dimmer
Orange
Antenna
Right Front
Front Speakers
6" x 9" Doors
Left Front (+)
Light Green/Red
Left Front (-)
Light Green/Green
Right Front (+)
Light Blue/Red
Right Front (-)
Light Blue/Black
Rear Speakers
6 1/2" Rear Door
Left Rear (+)
Dark Green/White
Left Rear (-)
White/Dark Green
Right Rear (+)
White/Purple
Right Rear (-)
Tan/Dark Green
Kenwood Wires:
Red: Switched 12volt
Yellow: Constant 12volt
Black: Chassis Ground
Blue: Not used
Light Blue/Yellow: Steering wheel control
Brown: Mute Control
Blue White: Power Antennae (or Amplifier remote turn on)
White - White/black: +/- left front
Gray - Gray/black: +/- right front
Green - Green/Black: Left rear
Purple - Purple/black: right rear
Hello there, Well the wiring colors appear to be standard for most every piece of mobile A/V equipment out there. Yellow = Battery Power(12V Positive) Black = Ground / Battery Negative Red = Vehicle On / 12V+ (or also hook it to the 12V Positive for "always on")
Radio wire colors:
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
1991 Oldsmobile Cutlass Supreme Car Stereo Wire 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′
Car Audio Front Speakers Location: Dash
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
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Check your neutral switch, its usually on drivers side on the back of stearing column .Its easy to reach and if you consult a mechanics service book, it will be alot easier to find and save you alot of frustration. Please rate this. Thanx.
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