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A blown fuse is more likely. Most cars have two fuses in the vehicle fuse box that can supply power to the stereo, and there's another fuse built into the back of the stereo unit itself. It's not uncommon for one or more of these fuses to blow when the battery is changed.
There are 2 powers for this stereo. The is a constant power (yellow wire) which holds the memory, then there is an ignition power (red wire) that turns the stereo on when you start the car. Some cars you need to run the red power wire to a fuse that only works when the car is turned on, for example power windows. Only run it to a fuse that is equal to the fuse on the back of the stereo ( more than likely 10a). Oh and btw check the fuse on the back of the stereo under the plug. If none of these work you have a bad stereo. Or you hooked up the wires wrong.
TAKE IT OUT AND TRY IT ON A 12V BATERRY AND IF IT TURNS ON ITS GOOD AND IF IT DOESNT IS NOT GOOD. IF IT TURNS ON FOLLOW UR CONSTAN AND UR POWER WIRES AND SEE IF IT HAS A FUSE BOX IN THE BOAT/ CHECK THOSE FUSES. AND CHECK UR BOAT BATTERY TOO CAUSE IT COULD HAVE DIED WHEN TESTING THE STEREO TOO IT HAPPENS ALOT ON BOATS
The problem is bad wire connections, check the connections you made, if you don't understand the diagrams go to an expert. You can cause major problems if you keep trying and doing it wrongly. If you know what you're doing, if everything is ok and the problem persists try the same stereo in another car to check if the problem is that.
There are some tests you can perform for checking the stereo. Yes, you are right, there is a yellow and red wire. Yellow constant power, red is switched throught the ignition. During the installation, you may have blown a fuse. A bigger fuse is not needed, stick with the same size if you find a bad fuse. Hook the red and yellow wire together for TESTING PURPOSES to one or the other of the hot wires in the vehicle. This will also test to see if you have a bad fuse. If the stereo powers up in one or the other power connections in the car and works, you have a blown fuse. I have seen some fuses be located under the hood of the car near the car battery. Hope this helps, Bob
since it worked before and you didnt change anything and now there is no power it looks like you blew a fuse when connecting wires. check the radio fuse on the door panel, and check the int. lighting fuse under the hood of the car. take both out and see if they are blown, if blown buy new fuses and replace.
heres the wiring diagram for a 1990 Ford Taurus:
Left Front (+) orange/lt green
Left Front (-) lt blue/white or Blk
Left Rear (+) pink/lt green
Left Rear (-) dk blue/ orange or Blk/Wht
Right Front (+) Wht/Lt green
Right Front (-) Dk green/ orange
Right Rear (+) pink/Lt blue
Right Rear (-) Tan/White
Lt green/yellow Hot at all times
Black - Ground
Yellow/Blk - Ignition
Lt blue/red - Acc
Orange/blk - Dimmer Lights
RED - Lights
Check all the connections with an analogue multimeter set to 12 volt dc.You should get fsd at all points. There is no doubt that you have an intermittent fault on the wiring.However, there is a slim possibility that this fault may, in turn, have caused damage to the clarion.If you cannot find a fault on the wiring, then consult a repair manual (available to download) to see whether or not there is a fuse inside the clarion. If there is one fitted, check that to see if it is blown. If thate above does not sokve the problem you are welcome to email me for further help on email@example.com. But I think fokkowing the above advice shoukd solve you lack of sounds in your car. All the best