The other day my car broke down the fuse 23 and 24 blew and now blow constantly i think it may be due 2 the fuses the prior owner put in being to high of an amp now caused wires to melt heading from the ciggerate lighter parking brake and speakers do they sell a new wiring harness for the back ? Or would i have to cut or pull one from a junkyard and is there any other issue i might be overlooking Wires melted down to copper

 

First I would work out what wire was going where, trace and remove the offending wires and work out what has been changed

 

I can only assume something has shorted in the Fuel injection relay or someone ran a wire straight to the fuel pump from a hot source like the cig lighter and upped the fuse to compensate for the power draw