Aftermarket stereo turns on but no sound

SIRWILLIAMSON

MEMBER
1996 JEEP GRAND CHEROKEE
4.0L
4WD
AUTOMATIC
220,000 MILES

I put an acoustic radio in my jeep. I spliced all the wires and connected them just like I was shown to do. So then I have a blue cord on my radio wires that says auto antenna. That doesn't have a place to hook up? So I plugged my radio in thinking it'd be Ok and my radio turns Ok saying that its playing but no sound is coming out any where. I have the infinity gold amp in the back seat and I was wondering if that had something to do with it? My factory radio worked just fine but since I put this new radio in it doesn't send out sound

So what is it I need to do to get sound out? Go around the amp? Or is there wires I have that isnt hooked up that I need to?

7 Replies

CARADIODOC

MECHANIC
33,741 POSTS

The amp needs a signal from the radio or it will not turn on causing the no sound issue or there is a fuse blown for the amp.

Here is a guide and a wiring diagrams to help us get the problem fixed.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

That blue wire is the switched power turn on signal for a power antenna and/or amp. The amp in the vehicle needs a turn-on signal and it gets it on that last wire in the black plug. Those are the two that have to be connected.

Please let us know how it goes

Cheers

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Tuesday, November 26th, 2019 AT 7:23 PM

STEVE PRESS

MEMBER
2 POSTS

I have taken out the old stock radio to replace it with a JVC radio model number KD - g400. To do the swap I had to buy the JVC radio harness and the harness to switch from stock radio to aftermarket radio for the truck itself, after everything is hooked up properly I cannot get sound out of my speakers but everything else turns on. The only way I have sound as if I hardwire from the JVC harness directly to my speakers. What would be going wrong for that to happen?

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Tuesday, November 26th, 2019 AT 7:23 PM

CARADIODOC

MECHANIC
33,741 POSTS

If you're researching this topic, here's the link to the original post:

https://www.2carpros.com/questions/no-sound-to-radio

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Tuesday, November 26th, 2019 AT 7:23 PM

ERIC ROBERTS2

MEMBER
2 POSTS

I have a similar problem in my 2004 Grand Cherokee. The factory radio works fine.I have sound. I put in an aftermarket Boss radio so I can have a Bluetooth connection and hands free operation. I don't think I have an amp. Could be wrong. The wires in the aftermarket plug are aligned up with the plug that comes with the radio. I am not using the power antenna as I don't have a power antenna. The aftermarket plug that connects to the plug coming off the car doesn't have any amp wires, so I am assuming that means I don't have an amp. So the radio powers up. If I tune to a station, I think the light bars are indicative of sound being generated. Not sure since I don't have sound LOL. I am at a loss. There aren't any fuses for the speakers or anything like that and, like I said before, the factory radio produces sound. This isn't the first time I have installed an aftermarket head unit and every other time it seemed to go pretty smooth. Do I have to hook up the power antenna wire to something to make this work? I am completely perplexed as to why this isn't working. Electrically speak. This vehicle is the most frustrating I have ever dealt with. Whomever decided to place the junction bloc under the dash the way they did needs to be beaten. That is like the worse design ever.

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Tuesday, November 26th, 2019 AT 7:23 PM

CARADIODOC

MECHANIC
33,741 POSTS

Look under the passenger seat to see if your vehicle uses an amp. By 2004 radio amps, and most computers on all brands of cars no longer turn on simply by turning on the ignition switch. The original radio generates a digital "turn-on" signal that is broadcast over the data buss. The amp turns on when it sees that signal.

I suspect there is something available through places like Crutchfield or Best Buy, but it would be easier to eliminate the amplifier. There are jumper plugs available for that, or you can cut and splice the wires.