Check the fuse. Locate the car fuse box. Replace the bad wire. If you don’t hear a sound and you are absolutely sure that you have done everything correctly, the problem is most likely in the wiring. Make sure that stereo and car ground wires are connected. If necessary, disconnect and trim the wire a bit and connect it again. If the problem still persists, you will need to go to the mechanic and have him replace the car ground wire.Check if ground presence is OK. Set the multimeter to continuity mode. With the negative probe still on the ground terminal, place the positive probe on the black ground wire. If ground presence exists, your multimeter should produce a sound.Locate the ground wire. We will need to make contact with the ground wire that connects the stereo to the car. Ground wires are always black.Evaluate the results. Once again, if there is no value measured by the multimeter and you have done everything as you should, you have a blown fuse in the car use box. If the value measured is twelve volts, the switch wire and its fuse are in working order. If readings show that everything is OK, yet your stereo still won’t turn on, we will need to check stereo’s ground presence.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.Locate the wire. Twelve volt switch wire is yellow or red. Look at the back of the stereo for indications of the wire types.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. You most likely have a blown fuse. If there is voltage on the constant wire and the multimeter shows values around twelve volts, we can proceed to test the twelve volt switch wire.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.Take the stereo out. Make sure that your stereo doesn’t have an alarm and take it out of the cockpit but don’t unplug it. Locate the ground terminal and constant wires.Step by step: How to Fix a Car Stereo That Has Power But Won’t Turn On? While we work hard to provide accurate and up to date information that we think you will find relevant, Forbes Home does not and cannot guarantee that any information provided is complete and makes no representations or warranties in connection thereto, nor to the accuracy or applicability thereof.Car stereo issues are very common, especially with older cars. This problem can have several causes, most common ones being blown out fuses and bad wiring. The compensation we receive from advertisers does not influence the recommendations or advice our editorial team provides in our articles or otherwise impact any of the editorial content on Forbes Home. Second, we also include links to advertisers’ offers in some of our articles these “affiliate links” may generate income for our site when you click on them. This site does not include all companies or products available within the market. The compensation we receive for those placements affects how and where advertisers’ offers appear on the site. First, we provide paid placements to advertisers to present their offers. This compensation comes from two main sources. To help support our reporting work, and to continue our ability to provide this content for free to our readers, we receive compensation from the companies that advertise on the Forbes Home site. The Forbes Home editorial team is independent and objective.
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