Recently my Delco radio would would only power my tweeter speakers.
Sometimes all the speakers would work, full sound.
Then only sound through the tweeters.
Thinking it was the radio I replaced it with a Kenwood. I hooked it up
and again only sound through the tweeters. While driving down to NJ I was listening
to only tweeter sound, better than nothing. All of a sudden all the speakers came on and stayed on until I reached my destination. Got in the vehicle the next day and only tweeter sound. Any ideas what might be causing this?

Richard

 

ground wire
maybe

 

There has to be a lose connection somewhere, I do not think its a ground, if it was, the deck would cut out, and not just some speakers and leave the tweeters on.

 

I cut the ground (black wire) from the harness and grounded the radio, no go.
I just went to the sore and I had full sound. Just about blew me out the Blazer.

 

Another observation.
When the radio works, only the left speakers work.
When it dose not work both left and right tweeters work.
Rear speakers do not work.

 

Start looking at all the connections, something is loose there for the speaker wires