only 1 speaker works out of 4

is there an Amp fitted to the system?

nope every thing is still factory only thing i did was change the radio

Then you must have the wiring wrong, do you have the wiring code for the new radio? what i do is temp hook a speaker one at a time to each speaker wire set at the radio just to prove i have the correct set (front back left and right) then do the hard wiring, i always lay new speaker wires as well.

yea it was doing that with the factory radio