Ok, so speakers are not fused (usually). You need to get at the speakers.
Yep, a separate amp would be fused, but if you had a separate amp, the test speaker was testing in the wrong place. Did you have speaker wires on the back of the radio; or cables that connect to an amp?

If the sound is there with a speaker connected to the back of the radio, the built in speakers are either open (read bad), or the speaker leads are open.
Pull out a speaker and place your test speaker across the built-in speakers terminals. If it works, bad speaker(s).

 

but all 6 are diconnected? i was wondering if this sounds like it may be from a bad amp installed by explorer conversions ? because the radio works if i plug it into one of the factory speakers. but i was wondering where they may have put the amp for the rear? also why would there be connection in the explorer conversion fuse box and why would they run wires to said fuse box if they were not going to use it ? from what i understand these vans the were converted by individual companies were pretty much a custom job

 

and the location of the speakers are in a spot that has never been removed thats why i am leaning towards a aftermarket amp that may have failed

 

Ok so update i just got off the phone with explorer conversions i was told by a grumpy old man that the reason the rear radio did not play into the speakers was because they only play thru the head phone jacks so ok ok i can buy that but then why the heck are the other six speakers not working and if that was the case i find it hard to beleive that they are running 10 speakers from a factory radio (front) ?!?! now there is a button that switches the tv from speakers to audio jacks but only a aux cord coming from the back of the tv to a two wire connection so if they are saying the tv controls the phantom 6 speakers how so with only two wires at this point i am lost???

on a side note my grandfather owned this van from brand new and i want to say i have used the back radio to play music when i was young not 100% on that been a pretty good strech of time!

 

Ok, regardless of what the guy on the phone said, the van is a house when parked, why would the factory force you to use headphones?

I don't know if you have an amp, and I doubt if any one on here knows either, you are going to have to poke around until you find out for yourself.

And, are 10 speakers connected to the dash radio, again, I don't know, but turn on the dash radio and walk around and listen to the speakers.

 

i understand about the amp was just hoping that maybe someone on here had found one on thiers. as for the 10 speakers i know 6 are not working thats what im trying to figure out why. "Ok, regardless of what the guy on the phone said, the van is a house when parked, why would the factory force you to use headphones?" because there are two one in the front and one in the back.
but i agree i will just have to start taking stuff apart for find the problem

 

Not to kick a dead thread, but I also have an explorer conversion van. In mine, the rear radio plays through headphones only, and those other speakers are for the tv. Also, my amp is under my rear bench seat. It's in a cylindrical enclosure, and it also only works with the tv.

 

Hey thanks for chiming in, if he is still around that will help.

 

Yeah, that's what I figured. I wasn't sure if he figured it out yet or not, but if he did, it might help someone else

 

yeah not figured it out yet but i will be sure to look for the amp. so on your does it have the switch where it says tv/radio so are the jacks hooked up to the radio and tv?

 

On mine, I have a switch for the TV output that switches between the speakers and the headphone jacks. I have separate jacks for the TV and rear radio

 

so all the wires are ran into the the amp you located under the rear bench? because mine has the power folding bench/bed and if i remember right the original t.v just had an audio jack? i could be wrong about that but if im not does it run straight from the amp to the t.v?

 

I've never had the rear apart, so I'm not positive, but I believe my audio runs straight from my tv, to the switch, to either the headphone jacks, or the sub/amp and speakers depending on the position the switch is in. Is that what you were asking about?

 

well mine is a 96 but only has 50,000 miles but i am trying to figure out if all the speaker wire are connected to the amp ( i have not located yet) and if the sound wire from the tv goes straight to the amp then to the speakers?
problem is i have no sound from my original tv in the van

 

Have you made sure the switch is hooked up all the way? On my switch, there's a molex plug with 4 or 5 wires, and then there's one on its own, and if I don't plug the one wire in, I don't get any sound. Mine is an 04 though, I don't know how much they wouldve changed in 10 years

 

"Mine is an 04 though, I don't know how much they wouldve changed in 10 years" im guessing alot lol

 

Is there a switch for on/off speaker usage?
My 2014 GMC Explorer conversion van has an on/off switch for using particular speakers in the van's rear area.

 

they way i understand is it might be just for the tv in the rear speakers

 

Thanks for the posts on this topic, as it now makes sense on my Explorer Conversion Van - Although I have a 98 Ford E150, with a high top but it was converted by Explorer. I couldn't figure out why my Rear Radio was not playing either, so started testing. I found it would play out of the Headphone jacks, but not out of any speakers. When I take a speaker wire directly out of Radio and connect to an extra speaker to test, the radio works fine.
My setup (think is factory).
Dash Head Unit plays 6 speakers:
2 - Front (in doors)
4 - Rear (2 midway back 5x8 Ford speakers, like doors)
(2 in back corners)
If I place the Dash unit to fade to the Rear only, the 4 rear play.

The other 2 small 4" round speakers are connected to a small TV mounted on ceiling.

I do have another 5/6" round speaker, only one on the wall. My guess this is for the additional TV that is mounted in high top above and between Driver and passenger seats. Haven't got that tv working yet as previous owner had some dvd connected.

So, I think the grumpy guy is correct that back in the 90's they (Explorer) might of just had that rear radio connected to Headphone jacks.

Not sure what I will do with that radio, could run a wires out on it for external speaker setup when parked. But then the dash radio works fine and runs off the same battery anyway (only one battery on van).

 

This thread actually helped me, I thought the cylinder under my bench seat is only a subwoofer, now it makes sense why lots of wires going in to that . And yes the rear radio I figured by taking it out and checked the connection, I am trying to add. Back up camera. So upgraded my main head unit

 

I have one question, mine is a 2004 gmc Savannah van and under the front passenger seat there is some wires placed any one can tell me what that is for?