Rep Power: 0

So i am having trouble with a new radio i installed into my 99 civic coupe and basically it was working fine when i had installed it and i decided to put some speakers in the next day after i had installed the radio and i put the front two in and it was working and i had drove it to work and it was working pretty well then when i got home i installed the rear speakers then my radio had turned off and ever since it works half the time. i had noticed that my keyless entry and locks started being weird as well but im not to sure what it could be. the radio is a boss audio bv9370b and i had kenwood speakers for front and back

 
Rep Power: 368

you have a short somewhere.
retrace your work and recheck them.
Also, old wires can get damaged and moving them can cross the line

 
Rep Power: 223

Boss isn't the greatest brand, how did you do the wiring? The proper way with an adapter harness and crimp connectors/solder?