Rep Power: 0

I recently installed a new head unit and my front speakers will not work. The Passenger tweeter does work and at times both speakers will work. The speakers work with the old radio. I pulled them out and tested them directly to head unit and they worked so they aren't blown. When I was installing the head unit , the blue power antennae trigger connector came loose from the head unit, so I didn't not connect the blue cable leading from the vehicle to the head unit. Could this be the cause of the speakers not working, I thought the blue wire was only used to power amps?

 
Rep Power: 196

The blue wire is a remote turn on wire. It is used for amps and in some cars power antennas or antenna amps.
If you speakers work sometimes and not others it is a short somewhere. Either in your connection from the head unit to the harness, somewhere in the speaker wiring, the speaker connection or in the head unit itself.