Altima speaker problem

[brivers]

Trying to get a 97 Altima ready for my daughter to drive. Original radio only plays out of right tweeter on dash and not loud. I put in an aftermarket radio with wiring adapters and got nothing. I did have to ground it for it to work. It comes on but no sound at all. I know the radio worked fine just before I pulled it from her old car. I now suspect the original radio was'nt bad. I find it hard to believe all the speakers are bad. My question is, I see these two boxes mounted under the rear window deck, are they amplifiers and can they be bypassed if they are bad? I pulled the connector off of one and lost the sound in the one tweeter with the old radio.Any suggestions would help. Thanks.

[PaulD]

not familiar with Altimas, might wanna ask the Nissan guys

[AWP9521]

It's quite possible you don't have the radio's remote lead wired to the harness to turn the amps on.

[brivers]

Well, as it turned out, all the speakers were blown. What are the odds? Thanks for the input.

[PaulD]

odds are pretty high actually. They are like $5 speakers.