I'm trying to install an aftermarket cd player in my 97 explorer when I wiring in the new deck to the speakers they don't no sound comes through the stock speakers is there an app I need to find?

sounds like you grounded out the speakers

This should help you wire up your new stereo. 97 Ranger stereo wiring diagram. They do make a plug in harness for your truck. Metra part number 70-5600.

Yes, that would be fine, make sure you solder the wires and tape well or use shrink tube on the connections.

Yes, many aftermarket radio/CD players are made that will fit. Look on WWW.Crutchfield.com

You may have a factory amplifier in the rear of the explorer in the right cargo panel. You need to supply power to it by connecting the amp power on (Blue/White I think) in the dash to a power source (such as red on your stereo harness) so it comes on with the key. If you do have the amplifier, that's why you have no sound.

Is your IP Bus cable on the INPUT and not the OUTPUT ? I know it sounds funny, but usually(95%), that's the case. If it's in the wrong plug, you'll have power and a display, but no audio. That's why your getting data but no audio.

Perhaps there was another system installed at another time and someone cut the wires within the system to make that particular stereo system work. Inspect the wires all the way from the decks wiring harness to the speakers, they could be cut and you might be able to splice the wires and reconnect them or you may have to run seperate speaker wire for each speaker to resolve this issue.

your installing an aftermarket cd player in place of factory radio?
it would be best to buy the harness adapters. they plug into the factory harness and will tell you what all the wires are. harness is usually only 10-15 dollars. here is the diagram also.

Here it is.

1996 Ford Explorer Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Green/Violet
Car Radio Switched 12v+ Wire: Yellow/Black
Car Radio Ground Wire: Black/Light Green
Car Radio Illumination Wire: Light Blue/Red
Car Stereo Dimmer Wire: N/A
Car Stereo Antenna Trigger: Orange/Blue
Car Stereo Amp Trigger Wire: Blue (If Equipped)
Car Stereo Amplifier Location: N/A
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Orange/Light Green
Left Front Speaker Negative Wire (-): Light Blue/White
Right Front Speaker Positive Wire (+): White/Light Green
Right Front Speaker Negative Wire (-): Dark Green/Orange
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Gray/Light Blue
Left Rear Speaker Negative Wire (-): Tan/Yellow
Right Rear Speaker Positive Wire (+): Orange/Red
Right Rear Speaker Negative Wire (-): Brown/Pink
-->

BE MORE SPECIFIC!

Why do you need to trace them? Is it a stock amp? If you know where the amp is....then tracing the wiring is a cinch....

The amp has to be powered, so there's most likely a power wire from your battery. If it's a stock amp, it's powered from behind your cd player. And be more specific, what speakers? There's like what, six?

They all go to one spot man, right behind the cd player.

What's spiking? The sound? As in it's loud, quiet, loud, quiet, loud? You might have a bad ground somewhere, so check grounds. Those are easy to find, behind the deck the ground is black. If it's an aftermarket amp, then the ground is going to be close by to it. It's most likely screwed to the steel part of your car.

It could be your deck to, it might have just got randomly defective. You do have a 96 after all.

If it's an aftermarket cd player...check your wiring harness. You have to cut the wires from the car to tie them into the harness for your cd player, so jiggle those around to see if you can hear a difference.