The only way mine will come on is if i connect the yellow and red wire together which makes it stay on how can i fix

Hi,

This is a car audio video unit
So to connect this unit electrically, they usually require 3 wires for power for it to switch on.

• The thick black wire is a earth or negative wire, which connects to the negative side of the battery or to the body of the car.
• Then there is a red and yellow wire.
• The thicker of the 2 wires red or yellow is constant 12volt power, which should be connected to the positive side of the battery or to constant 12volts in the car wiring plug.
• The other red or yellow which is the thinner of the 2 is a accessory wire, which means it has 12 volt power only when you turn the key to accessory or motor running.
• So yes both RED and YELLOW require power for the unit to be on .
• This is for radio station presets so it doesn't loose memory when you turn the key off, otherwise every time you turn the key you would have to store your stations again.

Red is on but it don't start