What should I do if my car stereo wont turn on?
Prepare your multimeter. Take your multimeter and set it to DC. Place the negative probe on the ground terminal, and the positive probe on the constant wire. If you are having trouble locating the constant wire, check the stereo user manual. It is also helpful to know that ground wires are most commonly green or yellow. Evaluate the reading.
Where is the 12 volt switch on a car stereo?
Locate the wire. Twelve volt switch wire is yellow or red. Look at the back of the stereo for indications of the wire types. Set your car to appropriate ignition position. Turn your key to the accessory position. Take the multimeter and with the negative probe on the ground, touch the volt switch wire with the positive probe.
What should my multimeter read if my car stereo is not on?
Evaluate the reading. If you have done everything correctly, the multimeter should show twelve volts. If everything is OK with the stereo, it should show that reading regardless if the car is on or not. In case that your multimeter doesn’t show a value, prepare to check the fuses.
What to do if your stereo has a hum coming from it?
If your stereo or video system has a hum or buzz coming from the loudspeakers, there are several easy steps you can take to discover what the cause and cure will be. If you need a more extensive procedure, click here for the extended version. First, you should determine the type of hum you are dealing with.
How to troubleshoot a car stereo that will not power?
Take a close look and make sure no wires are loose entering the harness. Make sure the harnesses are plugged into the car stereo. Trace back wiring from the car stereo’s control head power harness to the fuse block and verify that the wiring is all intact. If you encounter a fuse along the red wire, replace it.
Can a car stereo work with an aftermarket radio?
– In some cases, car stereos do not come wired with a 12v Accessory/Ignition wire, making an aftermarket radio difficult to install and work properly. Many Jeeps and Chevrolet systems have a data signal wire that carries a very low voltage signal that tells the OEM Head Unit when to turn on, however; it is not compatible with aftermarket units.
Why does my car stereo go into protection mode?
If your alternator is producing too much power, it will trigger the amplifier’s protection mode. Vice versa, if your battery is low and the amplifier is not receiving a constant 12v, it will enter protection mode. Amplifiers will also enter protection mode if there is a short somewhere.
What should the voltage be on a car stereo?
First off, check your wiring. If you have a voltage meter or a test light, test the ground (black), constant 12v (yellow), and accessory 12v (red) wires to make see if you have the correct voltage in the correct wires, as well as a good ground. Constant will always be 12v, whether or not your car is on.