It is for the dial light or the statiod memory
red
yellow
For a Pioneer CD car stereo, the memory wire is typically yellow. This wire is used to maintain the stereo's settings and stored information, such as radio presets, even when the ignition is turned off. It's important to connect it to a constant power source to ensure the memory functions correctly. Always refer to the specific manual for your model for accurate wiring information.
the black wire or yellow wire are not connected right
Nothing.
Yellow
The yellow wire with a black stripe on the back of a Pioneer DEH-P6400 is typically the illumination wire. This wire is used to connect the car's dashboard lights to the stereo, allowing the unit to dim or brighten in accordance with the vehicle's lighting settings. Properly connecting this wire can enhance visibility and aesthetics during nighttime driving. Always refer to the specific wiring diagram for your model to confirm its function.
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
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
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