My car stereo doesn't have these wires to connect to. If you don't have a battery tester, you can still see if the battery is good by jump-starting the car. The factory stereo works with no problems. It works in such a way that when there is a power interruption, the head unit by default goes off and is rendered useless. One’s in luck if the car stereo doesn’t have too many complicated fuses to check. Earlier today the head unit was working fine but now for some reason the unit won't turn on. If it still won't turn on, try a different wall outlet. NO POWER. When I reset the stereo it would buzz, and then do nothing after that. Make sure that your device is set to the correct voltage for your area. It's been 2 months like that and still don't work. It makes a like scratching noise then it'll shut off then turn back on. 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If your car won’t start but the lights and radio work fine, it could be one of several problems, possibly including a dead battery. If the metal wire inside the plastic casing is severed or damaged, a blown fuse is preventing power from reaching the starter relay or solenoid. The day after that the power button won't shut the radio off. Other causes can be a short in the wiring or other wiring problems. Don't rule out the possibility of a dead battery just because some of the electrical components work. Here, one needs some car stereo tools, like a test light or a multimeter. The weird thing is that the power button on it is still illuminated with a red light indicating that it is receiving power, but when I press it to turn on the stereo nothing happens. If you have a battery tester that can measure cranking amps, test your battery to see if it's weak. I bought the adapter for my car and it has two extra wires. The car's internal fuse box will have many of these blade fuses, all numbered. - I sold my friend a dual radio for $20 and it worked fine when it was in my truck. Now there is no clock or anything, but the buttons light up when I turn the interior lights on. If you have a manual transmission, a bad clutch pedal position sensor can prevent the engine from turning over while allowing the electronics to work fine. The reason it wont turn on is because your ground power is loose or cut off. It is so strange. Remove any surge protector. If the fuses are in good shape, the car's ignition switch is faulty. If your car won’t start but the lights and radio work fine, it could be one of several problems, possibly including a dead battery. How to Fix It When Your Car Heater Isn't Working. My car's stereo won't turn on? Sometimes you have to shake the battery cables and other times you need to put it in neutral and it will start. Take the stereo out. Join Yahoo Answers and get 100 points today. We put it in his, and you can hear the clicking through the speakers but it doesn't turn on. Cars are unforgiving environments for electronics, and vibration, heat and dust can all cause premature failure. We put his factory radio in and it lights up but won't play music. The reason why the radio, dash lights, headlights, and other electronics draw power while the engine doesn't has to do with the amount of current each device draws and what may be interrupting the path. Your radio may not be working because the protection mode has been turned on. Check to make sure the fuse is not blown. I took face off the stereo and warmed it up at home. How to Fix a Car Radio That Won't Turn Off. After you have verified that the car stereo is getting the correct amount of power, it’s time to look at your speaker wires. What to Do When Your Car Interior Lights Stop Working, Common Car Amp Problems (And How to Fix Them). We changed the radio If it doesn't start, it may be a blown fuse, a broken ignition switch, or a bad starter. There was a little pop and the radio turned off. The most likely cause of a stereo not powering up is a blown fuse. Everything looks fine but it won't turn on, I had the ground wire from the stereo connected to the ground wire on the harness. A good sign is that it has power, so it means it’s not busted. Headlights, radios, and other car electronics draw very little amperage—usually no more than 20 to 30 amps. You may need a fuse puller to remove the correct fuse and a light source to see its internal components. He also ghostwrites articles for numerous major trade publications. i need a bit more info to help you. 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