I was installing an aftermarket stereo. I installed a kit with a new wire harness. I was connecting all the wires fine. Well I connected the power antenna wire to the red wire from the stereo and now it won't come on. I disconnected the stereo and tried it in another vehicle and it works. What could have gone wrong? It 's a 93 Fleetwood brougham.

read (you meant main harness to radio sub harness.)
and car may have 5 or more harness for 5 or more very complex radio head end options new,so only the real service manual covers all that for sure,or if lucky 2nd fiddle here.

https://eautorepair.net/Marketing/Default.asp

The stereo pin layout can be obtained from the car dealership, also a repair manual should have the stereo wiring harness layout in it , the stereo harness adapter for installing non oem stereo, found at the local auto parts store will come with the wiring layout, wires are color coded too, sometimes the stereo harness or stereo harness adapter will have small writing on the wires itself, showing you what that wire is for, and where it should connect.

Basically it comes down to, obtaining the stereo wiring layout, read the description on the wires, and properly connect them together, then solder the wires or crimp them, I like to solder mine with soldering wire for electronics, and put shrink tubes to protect the wires, put the shrink tubes on the wires before soldering together, and ensure the shrink tube is the proper size awg wire gauge.

You will also need, aftermarket face adapter kit and antenna adapter, if installing aftermarket stereo.

Hope this helps and enjoy the stereo :)

what you need is to go on line " crutchfield " .com , they have wire diagrams for all vehicles, and aftermarket stereos , you need to know how to use your existing stereo wires to connect your aftermarket stereo wires to these wires ! crutchfield can show you how to decifer the color codes so you can connect these wires ! its very easy, just buy somthing from them , like the connectors you'll need to do this, get it. good luck

following is the procedure. u can also check ehow for more details.

Twist the negative cable off the terminal on the vehicle battery, using an adjustable wrench.

Remove the factory issue stereo. Pry off the radio trim bezel with a flat head screwdriver. Remove the four bolts on each corner of the radio. Pull the radio out the dashboard. Unplug the thick black radio antenna cable. Disconnect the wire harnesses from the rear of the stereo. Place the old stereo to one side.

Prepare the dashboard for the new stereo. Fit the radio installation sleeve provided with the aftermarket stereo to the radio installation kit. Feed the sleeve through the portal of the radio installation kit and bend the tabs on the sides of the sleeve to secure it in place. Feed the audio wiring of the Jeep and the radio antenna cable through the portal of the assembly and slide the assembly into the dashboard. Secure it in place with the bolts removed earlier.

Wire the new stereo. Connect the wiring of the stereo to the audio wiring of the Patriot, using a custom wire harness adapter. Push the connections together until they snap into place and test the connection by tugging gently on either end.

Plug the radio antenna cable into the alloted port on the rear of the aftermarket head unit.

Slide the connected aftermarket stereo into the prepared housing in the Patriot's dashboard. Click it into place in the radio installation sleeve, taking care not to trap any wiring.

Personally owning this car and installing several Hyundai stereo's, I would purchase a wiring harness kit from car audio shop or electronics retailer. The wire harness has a plug that connects to the cars wiring harness. This wiring harness kit will also list the wires to connect your new aftermarket radio to the harness. I would also recommend using crimped **** connectors to attach the two harnesses together.

I'm doing this from memory since it's been about four months since I actually did this.
This is for a 2005 LX. EX procedure may be slightly different.

Disconnect the negative battery cable and make sure it can't come back into contact with the negative battery terminal.

1) Remove the plastic tab (where a push button probably is for EX model) to the upper right of the radio.
2) Carefully pry off the plastic piece which surrounds the stereo. I used a thin screwdriver and sock, and slightly scraped things up. In hindsight I should have used a specialized pry tool for removing such things. I think there were four or five places where this plastic panel is clipped into place.
3) After you get the plastic panel pried off, slowly remove it. You will need to disconnect the three wire harnesses connected to the buttons / indicators on the plastic panel.
4) The plastic panel should now be out of the way. Remove the four mounting screws holding the radio in place.
5) Slowly slide the radio towards you. Disconnect the wire harness and the antenna.
6) You should be ready to install a new stereo.

As a side note, when pulling the wire harnesses apart be sure to pull from the plastic connectors and not on the wires. If you pull on the wires, they may come loose from the harnesses.

If you are hooking up an aftermarket stereo, be sure to use a wire harness to connect from the aftermarket stereo to the Pilot's harness (otherwise you'll end up having to cut off the Pilot's wire harness which isn't ideal). I'd also recommend soldering and heat shrink tubing the aftermarket stereo's wiring to the aftermarket stereo's wire harness. It takes a while longer than the crimp or electrical tape method but ensures a robust connection and no electrical shorts when done correctly.

My aftermarket stereo has a power antenna connection. This needed to be connected (the Pilot's antenna is part of the rear window and thus isn't powered) because there is a signal booster which requires power (otherwise you won't be able to tune into any AM stations and will get very poor FM reception).

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.

You best bet, because of a warranty, is to have a professional shop install your stereo. But if you are like all of us guru's here, you like to get your hands dirty.

First you need to remove the dash around your factory stereo. Be patient here and try not to break any of the dash. You may need to remove screws and pop loose plastic retainers located on the backside of the dash.

Wire the after market stereo to the harness located below by maching the colors provided. Thank the stereo companies for making this simple. Use crimp connectors or solder your connections, which ever best suits you. Tape up any remaining wires with eectrical to minimize the chance of a short.

Take the metal sleeve provided by the sereo you choose and install it into the install kit located below. Once you have removed the factory stereo, test fit the install kit and attach any tabs neccessary provided by the kit.

Now take the aftermarket stereo and place into the sleeve you installe din the install kit until it clicks into its locks. Now, the harness you wired up earlier, plug it into the factory harness and then into you stereo. Hook up the antenna, you may need to purchase a antenna adapter. Now before you install the stereo, do a test run to make sure everything is working. Once you are content that it is all working, install the new stereo and then reverse the steps in removing the dash panel and stereo.
Below are pictures of the needed hardware:

If you disconnect the stereo, does the temp. display go back to working properly? Did you connect the stereo Illumination wire correctly? Are all the other stereo wires connected correctly? Double check what the wires in the aftermarket harness are supposed to be and don't just go by color.

You need to attach the blue wire on the stereo harness to the blue and white wire on the car adapter harness. they installed a small amplifier to power the rear door speakers and unless you connect those two wires then the speakers will not work.