How do you wire up a alpine tve-t850? what is the red black and yellow wires

If you contact Alpine they will be able to tell you if there is an adapter that will plug right into your existing OEM harness. If not then, you'll have to figure out Which wires are which on your OEM harness, here is the Alpine wire code:
Alpine wiring help

HU harness color code pretty much universal.
red=ignition
yellow=battery +
black=ground
blue/white=remote turn on
blue=power antenna
pink/black=audio interupt in (not sure if you have one)
speaker wires
gray=right front
violet=right rear
green=left rear
white=right rear
speaker wire with black stripes is negative.

Try A Reset ?

Confirm this wiring for 2000 Nissan Altima Car Stereo Radio Wiring Diagram

Radio Constant 12V+ Wire: Pink
Radio Switched 12V+ Wire: Blue
Radio Ground Wire: Chassis
Radio Illumination Wire: Red/Green
Radio Dimmer Wire: Red/Yellow
Radio Power Antenna Trigger Wire: Green/White
Radio Amplifier Turn On Trigger Wire: N/A
Front Speakers Size: 4′ x 6′ Speakers
Front Speakers Location: Doors
Left Front Speaker Wire (+): Brown
Left Front Speaker Wire (-): Black/Red
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Black/Yellow
Rear Speakers Size: 6 1/2′ Speakers
Rear Speakers Location: Rear Deck
Left Rear Speaker Wire (+): Orange
Left Rear Speaker Wire (-): Black/Pink
Right Rear Speaker Wire (+): Blue
Right Rear Speaker Wire (-): Black/White

Hope helps.

Please let me know if you have any questions, and thanks for using FixYa.

1993 Dodge Dakota CDA-9833
Car Radio Battery Constant 12v+ Wire: Red yellow
Car Radio Accessory Switched 12v+ Wire: Red/White red
Car Radio Ground Wire: Black black
Car Stereo Dimmer Wire: Orange (tape this wire off) none
Left Front Speaker Positive Wire (+): Blue/White white
Left Front Speaker Negative Wire (-): Black white/black
Right Front Speaker Positive Wire (+): Purple gray
Right Front Speaker Negative Wire (-): Green gray/black
Left Rear Speaker Positive Wire (+): Black/Yellow green
Left Rear Speaker Negative Wire (-): Gray green/black
Right Rear Speaker Positive Wire (+): Blue/White purple
Right Rear Speaker Negative Wire (-): Blue/Orange purple/black

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

Please let me know if you have any questions, and thanks for using FixYa.

2004 Toyota RAV4 Car Stereo Radio Wiring Diagram Alpine wire color
Radio Constant 12V+ Wire: Blue/Yellow yellow
Radio Ignition Switched 12V+ Wire: Gray red
Radio Ground Wire: Brown black
Radio Illumination Dimmer Wire: Green none
Radio Antenna Trigger Wire: N/A blue
Radio Amplifier Trigger Wire: N/A blue/white
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): Pink white
Left Front Speaker Wire (-): Purple white/black
Right Front Speaker Wire (+): Light Green gray
Right Front Speaker Wire (-): Blue gray/black
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): Black green
Left Rear Speaker Wire (-): Yellow green/black
Right Rear Speaker Wire (+): Red violet
Right Rear Speaker Wire (-): White violet/black

if evrything is ok with the dvd (make sure the dvd is working fine), you need to hook up the yellow/ blue wires and yellow / black wires one for parking breack and the other for the breack chek the diagram on top of the alpine radio .

dnt get confused, follow these simple wiring .......
firstly cut off the old lug from the connected place, make sure you cut each wire seperatly....and you are going ti use the wiring agin, avoid making the wires shorter...
YELLOW..12V+ DIRECT FROM BATTERY...can be joined where alpine yellow was conected.
RED...12V+ IGNITION WIRE..can be joined where alpine red was connected
BLACK 12-, NEGATIVE....BODY GROUNDING
ALL SPEAKER WIRES HAVE +AND-, PURPLE/PURPLE----------WHITE /WHITE-------GREEN/GREEN.......GRAY/GRAY..ALL THESE ARE SPEAKER WIRES, COMPARE THE CONNECTION OF ALPINE AND FOLLOW THE COLOUR FROM APLINE LUG AND JOIN THE PIONEER LUG ....THEY HAVE BAISC COLOUR WIRE AND AHVE SAME TYPE CONNECTION..DO IT

1. you can go here and get a wiring manual with right model #.
http://www.alpine-usa.com/US-en/support/
2. The red wire goes to ignition switch/key.
Yellow wire goes to constant hot/battery.
Black wire is ground.
Blue wire is for power antana you do not need to hook that to anything.
You can look at this diagram for a little more help it is not your radio though but it will give you a reference point to look at. All radio red,yellow,blue,black wires are the same on all radios.
http://vault.alpine-usa.com/products/documents/OM_CDA-9884.PDF
go to page 42 on this site for wire diagram.
Good luck with problem.

Red: voltage source controlled by the ignition key Yellow: constant voltage source Black: ground Blue: power antenna activation wire (if equipped) Blue/white: amplifier activation wire (if equipped)