I'm new to the forum and have searched all over for my answer with no luck. I have a 1999 Ranger 4X4 that has the single disc head unit in it now. I purchased one of the factory pioneer 6 disc head units out of a 2000 2 door explorer today and when I tried to install it, it would not power on. The single disc is a single plug in type and the new 6 disc uses 3 plugs. I know the one is the sub output with the 4 wires that I will not be using right now but the other has 3 wires that I don't know what to do with them. After looking over several wiring diagrams for both vehicles, the main harness plug is wired identical for both other than a color change on one wire but it performs the same function. Not sure what is going on but I have nothing coming on the unit at all. Does this second plug need wired in to the harness somewhere? Any help would be appreciated since right now this has just been a waste of money to me.

 

could be missing a ground or power supply from one of the other plugs i know the explorers varied slightly from the rangers maybe one of the other plugs was for dimming controls and may also power the LCD screen in the radio making it seem like it won't power on?

 

Pic of rear of radio ?

I know mine has a 20 pin connector but that is for an external disc drive and can be used for iPod input.

 

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Sorry for the horrible picture of the rear plugs. I'm not sure this unit even works other than form the guy I bought it from. I'm thinking of getting a wiring harness adapter and wire it like it is an aftermarket unit. Still don't understand what all the wires are used for. I would like to be able to bench test the unit before going any farther but don't even know how to hook it up for that...lol.

 

I wish I had a book and could tell you exactly what the wiring was for but this is out of an Explorer Sport and there is a lot more interaction between the system and the head unit and possible amp. I got one of these radios a while back, sold it before buying a Pioneer which isn’t in yet either but you need the schematics.

One of the plugs is for power, one of for the speakers.
The large connector around 20 pins it is for the external disc player/amp and there is a connector you can buy (I have one) that connects your iPOD through that port, it could be the connector with only three wires in it but not sure. Chances are there was an amp in the vehicle you got this out of, located in the left rear of the vehicle, one of these connectors would be for controls to that and maybe even power but I am not completely sure and it could be that the large connector has all the controls in it for the amp.

Go on line and see if you can pull up schematics on an Explorer Sport with the Pioneer System and the year your came out of and you will need to find the radio and the wiring.

I was hoping that someone with a lot more Explorer Wiring knowledge would jump in but not happening yet.

I would look it up in my books are packed away for my move to Cali and I have no other references available except on line, which you can do too.

If I get some time I will see what I can dig up for you but start your search too, we both can learn from this venture.

 

Just thought of something else, I found that the 6-disc system didn’t work well in the JY Unit and as it turns out my OEM Unit, 6-disc changer has the same problem.
I was told to take the units apart and there is a connecting link that needs to be fixed but I haven’t done that.
When the new stereo gets in it will take care of that.

So make sure it is working before attempting to install the radio.

 

I have a PDF format of the rear wiring for the radio, I'm just not sure what it all means. As far as the plug with the power, ground, and speaker wiring it all looks to be about the same but not sure. I would post the diagram but can't find a way to upload it on here. The center plug with the 3 wires just shows protocol A, protocol B, and audio system on. The third plug is for the amp/sub control and will not be used as of now

 

There is a good chance that the main wiring is the same between both vehicles.
Plug in what you have and see how it works.
The extra wiring is for options.

 

Well, it's been a few weeks and I just got around to messing with this again. I can't even get the unit to power on while hooking up the power and ground wires for a bench test so I think the unit is just dead. Guess that's what I get for a flea market find.

 

Too bad on not working.
As said, I have seen the CD changer not working but never the whole radio.
Have you posted a Wanted Ad on this site, you could find a decent unit.

IF/WHEN I change mine I will have to get rid of mine.
ThenCD changer doesn't appear to work, I have never fixed it because I purchased a great iPod adapter that works through the AUX CD changer plug.
If you only need a good unit without the changer you can get one of the iPod adapter! they do more than iPods, or you could get mine for postage and then get the iPod adapter.

I found with the USA iPod Adapter I never wanted a CD.

Anyway luck to ya whichever way you go.