How do i know wich wire is wich voltage - Computers & Internet

is your supply gone ? difficult. check inside, you can see what leads feed what regulators, I hope. However, hard to build a supply with all them voltages... get a new one, I suggest. Luck...

Use ohm meter, see what cable has voltage.

Go onto google. Type the brand end model number into the search box. There are site where you can down load manauls for no charge.

the wire with the white stripe is +

I believe they should be pretty similar plug-ins (straight- straight or square-square). Cut one wire at a time and Wire them accordingly.

The LINE wire is the power supply or hot wire coming in. It should have continuous voltage (be careful).

The LOAD wire goes to the device to be controlled.

All the qires on your vehicle are 12volt.
Be careful on that. Seakers don't take voltage.
The red wire is normally the power wire to the radio, it is also bigger than the speaker wires. The Black wire is normally the ground for the radio and is also thicker and must be screwed to something on the dash board that is metal and a good ground Now all that is left are the speaker wires and you just match them to the ones you want.

You can get a wiring diagram by going to a web site for OMC Motors
Jim OMC Retired Mech

Power wire is usually yellow or red. A cheap test light from the parts store will tell you. The remote wire is almost alway solid blue. A volt meter will tell you for sure. Remember,the remote wire is very low voltage.

USUALLY THE BLACK IS ALWAYS GROUND AND THE RED CARRIES THE FUSE. IF IT DOES NOT SOLVE YOUR PROBLEM I GUESS YOU WILL HAVE TO TAKE IT TO A TECHNICIAN .THANK YOU.