Do you guys know what that little cable that looks like the antenna cable is for and what do I do with it if I'm upgrading the stereo to a jvc. Bought a stereo today and put it in, turns on but no sound coming out of the speakers, not even static, any ideas? Thanks

There are 2 antennas that plug in to the factory stereo. The bigger plug is for the power antenna on the passenger fender and the smaller is for the antenna built in to the rear passenger cargo window. Did you unplug the cables out of just the back of the stereo, or did you also unplug the factory amplifier (which needs to come out)?

Its tough to say. Do you have any pics?

Uhh, what do you mean it's tough to say? It's common for people to come on here and say they can't match up harness plugs because they have not pulled the factory amp. The amp won't plug up to an aftermarket HU harness adapter. The only way it can be a problem if you actually have hooked up the aftermarket HU is if someone did a butcher job and spliced the new HU wire-to-wire to the existing amp instead of using a plug harness. So instead of making us guess, please tell us how you hooked up your HU.

ok first: you need this for the smaller cable:

http://www.amazon.com/gp/product/B00...ilpage_o00_s00


then you need this to convert the two antennas into the single plug:

Amazon.com: Metra 40-UV43 Male to Female Motorola Antenna Cable: Car Electronics



This is what I used. Only have to raise the main antenna when the FM reception is bad, but most of the time I can leave it down.

I didn't butcher anything, I bought the adapter that goes from the factory harness to jvc hu. This has Jacks that plug behind the jvc for the factory speakers. I don't think I would but do I need to buy those adapters for both antennas or can I just use the big one? The amp thing is confusing me, what do I need to do with that, is this not allowing me to get sound.

I just unplugged the cables from behind the stereo, do I need to unplug the amp and how if so.

Follow the harness from the back of the stereo to the next component, which is the amp, It's an aluminum colored thing with cooling fins. You need to remove this along with the harness going from the amp to the stereo. You wont use them. The other harness plugged into the amp from the truck is what you splice your aftermarket adapter into.

I just did this last week the amp is the random metal box in the dash that was plugged into the factory stereo .... it held in with two screw pull it out and set it aside...https://www.youtube.com/watch?v=AbdoAcwrbJ8 Try watching this for a visual
this box pictured comes out

To answer your question about the antenna plug, yes you can just use the big one and leave the little one unplugged. Some people get those adapters to bridge both antennas but it's not necessary. I didn't use the adapters on mine and only used the big plug for antenna directly into the head unit and my reception is fine.

Additionally, on my brother-in-law's 4runner, his main antenna was broken so we got the adapter and only used the small antenna jack (the one for the antenna built into the rear window) and even that netted him decent reception. He said he didn't care about FM anyway.

If you search this, some people say bridging the two antennas is a good idea, others say it's not. The factory radio is designed to use one antenna or the other depending on signal conditions, but I don't believe it used both at the same time. This is what I gathered from my research doing the same install.

What everyone is suggesting you do is to bypass the factory amp and use the amp built into your head unit. To do this, you need to connect the harness from your head unit to the vehicle wiring BEFORE it reaches the factory amp. This is why you need to look below the factory head unit, find the amp, and find the connection from the back of the amp out to the speakers. This is where you plug in the adapter harness if you got one. I used this: http://www.amazon.com/Metra-70-1761-...+harness+metra

You need to wire that harness into the one that came with your head unit. Then you'll have a harness which on one end plugs into your JVC head unit and on the other end plugs into the vehicle's wiring (the vehicle end of the harness plugs in at two different places I believe). Also, make sure your using the amplified outputs from your JVC and not the red/white RCA plugs which are not amplified.

Now if your trying to keep and use the factory amp with your aftermarket head unit, I can't help you there. Not sure how or if that would work.

Yes, the factory amp goes away. You plug your new harness into the truck where the amp was plugged in to the truck.

You can use just the big antenna plug. I tried both ways, and I got more static with using both. I live in a region of strong signals so it may be different for me but just the big one alone worked better.

I still don't get how you could hook up to the factory amp from the JVC as those plugs are different.

Ok guys sooo, turns out I had all the right parts just had to read the wiring instructions a little closer. So the jvc harness only has one wire (blue & white) that is the amp & antenna while the adapter harness had 2, one blue & white which was the amp and a solid blue which was the antenna. After looking at the wiring diagrams again it said to combine both blues from adapter and connect to single blue & white on the jvc harness shown on the picture below where the pink arrow is. After that I had sound. The other thing that will interest you guys is the adapter I bought does go to the factory amp so I wasn't able to bypass it like you all suggested. Not sure if it would sound better with the factory amp or without it but sounds pretty dam good, alot better than the factory. I also hooked up an amplified bazooka bass tube and it brought it all to life. I will post a pic of the package to that adapter in case anyone needs it in the future. Thanks to all who gave me direction, I really appreciate it, hopefully this will help some one else.


Here is the packet to that adapter harness


This shows how everything is hooked up


The bass tube

And now that I have all this apart I'm going to send my climate control unit to JRZEE2000TR4LTD to give it some love. John, I will be shipping it out tomorow morning. I'll pm you to set up payment.