Problem with HU, no sound at all

[ShaneSauce 2]

My buddy drives a '00 frontier with a jvc head unit with aux.

His 6 3/4" door speakers are blown so they are disconnected and the only speakers he had were the stock tweeters in the door.

He got in the truck and no sound was coming from the tweeters.

Tried CD player, aux, radio and nothing.

Were thinking the tweeters could have taken a dump or the head unit is poop, or maybe a loose connection somewhere?

What could this be?

[NB50 206]

The tweeters could be driven off of the door speakers connections so if you have them disconnected then the tweeters wont work.

[ShaneSauce 2]

That can't be the case because he has been using just the tweeters since he has had the truck.

The door speakers were blown when he got it.

[jcarter1885 995]

That can't be the case because he has been using just the tweeters since he has had the truck.

The door speakers were blown when he got it.

For some reason I was having this same issue when playing tweeters off the headunit (they would go in and out and just cut off and stop playing, so I just got rid of them and unhooked all factory speaker wires so they dont have anything on them), but I was able to put some 6.5" speakers on the wires before I completely stopped using those wires and they worked fine so I dont know what it was.

[ShaneSauce 2]

The speakers are ruled out now,

He says when he pushes down on the front of the head unit really hard sound comes through again.

So there must be a loose connection somewhere behind the head unit.