The nature of car fuses means that you can easily replace a weak 5A fuse with a heavy-duty 40A fuse, since they have the same size and shape, but doing so could destroy your wiring or even cause a fire. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Poor head unit grounds are more likely to cause issues like ground loops than total failures, but if everything else checks out, you will want to verify that your head unit has a good ground before you condemn the unit. The problem may be in this circuit if this is the way the car is set up. Any ideas? Remove any surge protector. After you have verified that the unit is actually failing to power up and that it hasn’t entered an anti-theft mode, the next step is to check the fuses. However, you may want to consult the owner’s manual, if you have access to it, or contact the manufacturer if you don’t, in order to verify that there isn’t a specific procedure that you will need to follow. In most cases, a poor ground won’t cause the head unit to fail to turn altogether, while a ground that has become disconnected altogether will. 2 other fuses that affects the radio are 28 and 41. If the issue is still unresolved, service may be required. Sounds like someone hooked up the wire from the radio to an ignition wire instead of an accessory wire under the dash/in the steering column. Step 5. Jeremy Laukkonen is tech writer and the creator of a popular blog and video game startup. If the fuse connected to the car stereo has blown, the circuit will be incomplete and power simply can't reach the head unit (the part of the stereo in the center console). Since the car isn't registering in park, it won't turn on. The battery is not completely dead, but it is discharged, and even though it turns on the car lights, it can no longer start the engine. After I pull the key from the car, the radio will still be on. … If you get in your car one day, and the radio won’t turn on at all, it’s probably a... No Sound at All From the Car Speakers. If the radio turns on, the issue is resolved. Before you progress any further into the diagnostic procedure, you will have to remove the head unit to gain access to the wiring. It's a JVC KW-R910BT. New pioneer car stereo won't turn on - Answered by a verified Car Electronics Technician We use cookies to give you the best possible experience on our website. Car radio in my Volkswagen Beetle won't turn on? Why Can’t I Turn the Volume on My Factory Radio All the Way Up? I normally drive my car every single day. If a car wash attendant pushed it in to be helpful, or a prankster shoved it in while your car was parked somewhere, you could very easily climb back in, turn on the radio, and find that it won’t work at all. I put a new radio in my 2006 Jetta TDI in August. He also ghostwrites articles for numerous major trade publications. If you find a blown fuse, try replacing it and then driving around for a while to see if it blows again. If it still won't turn … If you have a voltmeter or test light, you can check for power and ground at the fuse block and also at the radio itself to help locate the fault. One will be located in your vehicle’s main or accessory fuse block, and it will often be labeled in an obvious manner. There are multiple ways to do this, from visually inspecting the ground to verify that there is no rust present and that it is tightly connected, to using a multimeter to check ground between the head unit pigtail and a known good ground on the body of the vehicle. All the fuses associated with the radio look fine, I only had one spare fuse so I changed the one on the passenger side panel and still no luck. If there are any doubts about the pigtail, you can remove it and replace it, ensuring that it seats properly. Identifying Aftermarket Car Stereo Wire Colors. For instance, a loose or corroded antenna can cause poor reception or no reception at all. If any of these fuses are blown, that may be the reason that your car radio won’t turn on, so you will want to replace them to see if that fixes the problem. This is may be the problem with your radio if it does not turn on completely. My Car Died and Then the Radio Didn't Work After I Jump Started It. If any of these fuses are blown, that may be the reason that your car radio won’t turn on, so you will want to replace them to see if that fixes the problem. You can bench test the unit by connecting the power and ground leads directly to 12V positive and negative, if you like, but if the power and ground both showed good in the vehicle, you are unlikely to find a different result with the unit removed. Turn the radio on. How to fix a car radio that won’t turn on. If your car won’t start, but lights come on, and the radio is turning on, it could be a few different problems. Since the car isn't registering in park, it won't turn on. Of course, a blown fuse is often indicative of another issue, so you should never replace a blown fuse with one of a larger amperage. Some cars are able to receive some stations, depending on proximity and signal strength, with the whip retracted, while others can’t tune in anything at all. Get the Latest Tech News Delivered Every Day, When It's Just the Car Radio That Doesn't Work, How to Fix a Car Radio That Won't Turn Off, Common Car Amp Problems (And How to Fix Them), What to Do When the Gauges in Your Car Aren't Working, What to Do When Your Car Interior Lights Stop Working, Why Your Car Won't Start Even Though the Lights Work, Fixing a Car Radio That Stopped Working After the Battery Died. Radio won't turn on 2 Answers. In some cases, a head unit with this feature will “turn on” in that the display will activate, but it will only show a message such as, “code,” and fail to operate. Why Doesn't the 12v Socket in My Car Work? Radio won't shut off when the door opens If my site is a value to you, I need your help could you please donate so I can keep this site free to everyone. Part of the series: Maintaining a Car's Electrical System. ​​If your radio flashes "code," then this is probably the issue you're dealing with. In that case, tightening the antenna connections or buying a new antenna will fix your car radio problem. I was able to get a jump and get the car started but the gps/radio wont turn on at all. Update: Thank you guys for your help! In some cases, with certain aftermarket head units and adapters, you may also find that unplugging the head unit and adapter for a time will fix the issue. Although you can check for power at the back of the radio with a test light, you’ll get a more complete picture if you use a multimeter. 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. I realized after I installed the radio that it won't turn off with the key in the car. If it is faulty, the car won’t start, yet the radio and lights will remain operational. If the amp fuse is blown, that is probably the reason that you aren't getting any sound out of your car radio. Check to make sure the fuse is not blown. Of course, a blown fuse is often indicative of another issue, so you should never replace a blown fuse with one of a larger amperage. Turn the ignition key to the accessory setting and press the “Power” button a few times to verify the condition. How to Fix a Car Radio That Won't Turn Off, What to Do When Your Car Interior Lights Stop Working, Common Car Amp Problems (And How to Fix Them), What to Do When Your Car Radio Suddenly Stops Working, Why Your Car Won't Start Even Though the Lights Work. Problem: The Stereo Has No Power and Won't Turn On. Answer Save. Some head units have a security feature that prevents them from operating after power has been interrupted. Since these parts require no more than usually 20-30 amps, they can run on a … Car stereos with... ​​If your radio flashes "code," then this is probably the issue you're dealing with. He is also a systems administrator for an IT firm in Texas serving small businesses. Securely plug your device to a working wall outlet. 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