It is for the dial light or the statiod memory
red
yellow
the black wire or yellow wire are not connected right
Nothing.
Yellow
Car Radio Battery Constant 12v+ Wire: White/Yellow Car Radio Accessory Switched 12v+ Wire: Yellow/Red Car Radio Ground Wire: Black Car Radio Illumination Wire: Red/Black Car Stereo Dimmer Wire: N/A Car Stereo Antenna Trigger Wire: Yellow/White Car Stereo Cell Phone Mute Wire: N/A Car Stereo Amp Trigger Wire: N/A Car Stereo Amplifier Location: N/A Car Audio Front Speakers Size: 5 1/4″ Car Audio Front Speakers Location: Doors Left Front Speaker Positive Wire (+): Blue/Green Left Front Speaker Negative Wire (-): Gray/Black Right Front Speaker Positive Wire (+): Red/Green Right Front Speaker Negative Wire (-): Brown/Black Car Audio Rear Speakers Size: 6 1/2″ Car Audio Rear Speakers Location: Rear Deck Left Rear Speaker Positive Wire (+): Blue/Yellow Left Rear Speaker Negative Wire (-): Gray/White Right Rear Speaker Positive Wire (+): Red/Yellow Right Rear Speaker Negative Wire (-): Brown/White
Car Radio Battery Constant 12v+ Wire: Blue/White Car Radio Accessory Switched 12v+ Wire: Yellow/Red Car Radio Ground Wire: Black Car Radio Illumination Wire: Red/Black Car Stereo Dimmer Wire: Red/Green Car Stereo Antenna Trigger Wire: Yellow/White Car Stereo Amp Trigger Wire: Violet/Red Car Stereo Amplifier Location: N/A Car Audio Front Speakers Size: 5 1/4″ Car Audio Front Speakers Location: Doors Left Front Speaker Positive Wire (+): Blue/Green Left Front Speaker Negative Wire (-): Gray/Black Right Front Speaker Positive Wire (+): Red/Green Right Front Speaker Negative Wire (-): Brown/Black Car Audio Rear Speakers Size: 6 1/2″ Car Audio Rear Speakers Location: Rear Deck Left Rear Speaker Positive Wire (+): Blue/Yellow Left Rear Speaker Negative Wire (-): Gray/White Right Rear Speaker Positive Wire (+): Red/Yellow Right Rear Speaker Negative Wire (-): Brown/White
Usually in the basics of any head unit installation you need to wire everything according to color... For what your askin the constant wire coming out from your car and coming out from your stereo is yellow so look for that first
Car Radio Constant 12V+ Wire: Blue/Yellow Car Radio Ignition Switched 12V+ Wire: Gray Car Radio Ground Wire: Brown Car Stereo Illumination Wire: Green Car Stereo Dimmer Wire: N/A Car Stereo Antenna Trigger Wire: Black/Red Car Stereo Amplifier Trigger Wire: N/A Front Speakers Size: 5 1/4″ Front Speakers Location: Doors Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speakers Size: 6 1/2″ Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
Car Radio Constant 12V+ Wire: Blue/Yellow Car Radio Ignition Switched 12V+ Wire: Gray Car Radio Ground Wire: Brown Car Stereo Illumination Wire: Green Car Stereo Dimmer Wire: N/A Car Stereo Antenna Trigger Wire: Black/Red Car Stereo Amplifier Trigger Wire: N/A Front Speakers Size: 5 1/4″ Front Speakers Location: Doors Left Front Speaker Wire (+): Pink Left Front Speaker Wire (-): Purple Right Front Speaker Wire (+): Light Green Right Front Speaker Wire (-): Blue Rear Speakers Size: 6 1/2″ Rear Speakers Location: Rear Deck Left Rear Speaker Wire (+): Black Left Rear Speaker Wire (-): Yellow Right Rear Speaker Wire (+): Red Right Rear Speaker Wire (-): White
Car Radio Constant 12v+ Wire: White/Green Car Radio Switched 12v+ Wire: Yellow/Red Car Radio Ground Wire: Black Car Radio Illumination Wire: Red/Black Car Stereo Dimmer Wire: Red 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 (+): Green/Black Left Front Speaker Negative Wire (-): Light Green Right Front Speaker Positive Wire (+): Green/Yellow Right Front Speaker Negative Wire (-): Gray/Red Rear Speakers Size: N/A Rear Speakers Location: N/A Left Rear Speaker Positive Wire (+): Blue/White Left Rear Speaker Negative Wire (-): Blue/Black Right Rear Speaker Positive Wire (+): Pink Right Rear Speaker Negative Wire (-): Blue/Yellow
2008 Dodge Grand Caravan Car Stereo Install Guide Car Radio Battery Constant 12v+ Wire: Yellow/Red Car Radio Accessory Switched 12v+ Wire: N/A Car Radio Ground Wire: Gray/Violet Car Radio Illumination Wire: N/A Car Stereo Dimmer Wire: N/A Car Stereo Antenna Trigger Wire: N/A Car Stereo Amp Trigger Wire: Pink 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 (+): Gray/Violet Left Front Speaker Negative Wire (-): Gray/Yellow Right Front Speaker Positive Wire (+): Dark Green/Violet Right Front Speaker Negative Wire (-): Dark Green/Yellow Car Audio Rear Speakers Size: N/A Car Audio Rear Speakers Location: N/A Left Rear Speaker Positive Wire (+): Gray/Light Green Left Rear Speaker Negative Wire (-): Gray/Dark Green Right Rear Speaker Positive Wire (+): Dark Green/Light Green Right Rear Speaker Negative Wire (-): Dark Green/Gray