i have the computer powersupply 400w and i dont know what cable to connect to the car stereo???
if you have a volt meter eather of the black wires are ground you will see a red and a yellow one is 5 volts and the other is 12 volts the 12 volts wire paired with one of the black wires will power your car audio
If is an aftermarket head unit , connect the thick yellow (continuous power) and red (accessory power) wires together to the positive red wire of the power supply 12V. Next connect the black wire (ground) with the black wire of the power supply. You should be ready now.
