Wireing My head unit

Theres the red yellow and black wires.. Blacks ground the other two are 12 volt constant and Acc. If I hook them all up black/black red/red yellow/yellow My headunit turns on than right off. If I hook up both yellows and reds together (all 4 together) My headunit works fine but I shut the car off and lose all of my presets.. Any ideas why it wont work right? Am I missing something stupid here...?

remote?

^^^^^ you SHOULDN'T hook constant and ignition together...if im reading that correctly.

so red to yellow and yellow to red??? I tried that and got nothing.. Ill check my yellow wire fuse

okay your yellow is you 12V constant power and you red is your acc. you cannot hook those two together. if you do ya it will work but you lose everything when you shut it off cause the acc is wired up to your constant. what you need to do is find a fuse or wire that has constant power to it and hook your yellow wire to it then find a SEPERATE wire or fuse that only has power when igniton is at the acc position and hook the red wire to that. it will work perfectlyand you wont lose anything. oh ya hook your ground(black) to any good ground on your truck. Make sure its good to or your cd player will cut out on you. if theres paint sand it or scrpe it off so you get a good ground.

1986-89 Mazda B2000/B2200 Stereo Information
Constant 12V+ Blue/Red
Switched 12V+ Red/Black
Ground n/a
Illumination Blue/White
Dimmer n/a
Antenna Right Front
Front Speakers 4" Dash
Left Front (+) Blue/Red
Left Front (-) Blue/Yellow
Right Front (+) Blue
Right Front (-) Blue/White
Rear Speakers 4" Side Panels
Left Rear (+) Blue/Red
Left Rear (-) Blue/Green
Right Rear (+) Blue/White
Right Rear (-) Blue/Green

might help might not you can test speaker wires with a 9volt and you need a volt meter for ign and con

Thanks guys im pullin it apart today and making it right.

Thanks to that wiring schematic I got it all wired last night correctly.. thanks tons guys.

awesome!