If it's dropping below ~11v, you need to determine why. Some protect lights are green or blue instead of the usual red. This is also a good time to make sure that the amp is not directly touching the metal of the car at any point. An audiophile and automotive gear head, James loves to write about the latest equipment and technology of both industries. In that case, you’ll need professional assistance. An amp that’s too hot to touch with your bare skin is a sign of two of the most common causes of protect faults: lack of airflow, and load mismatch. This is common on older Alpine amplifiers. Just like with the circuit breaker analogy, if you follow the proper steps, you’ll have your amp working again in no time. On-board Fuses: If you are unsure about this, you can email me or ask someone on a forum where they're familiar with the amplifier you have. You RCA wires ate messed up. If the voltage remains near or above 12v but the amp still goes into protect mode, disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. Generally, the power light is green or blue and the protect light is red but on some amps, the protect light is green and the power light is red. what caused amp to go into protect mode? The 10 Most Popular Ford Mustangs of All-Time. At each connection, fuse or other point where the wire is not continuous, check the voltage. If the fuse holders are melted, you need to have the amp checked by a technician to determine why they melted and to determine if the fuse holders are usable. Other amplifiers ONLY illuminate the protect LED when there is a problem. These amps indicate protect mode by blinking the power light before shutting down completely. We hope you’re back to listening soon, hassle-free. Yes, protection mode is a built-in feature of the amp, and yes, whatever caused it can almost always be fixed. Most meters will not read to 0 ohms. If the power light blinks then goes off, the amp is either going into protect mode or there is a bad connection in the power supply wiring. Look for clean, secure connections at every port. If it doesn't go into protect, reconnect one pair of speaker wires at a time. Sometimes the protect light turns on for two seconds when the amp does, like a check engine light, and then shuts off. 4. One of the more confusing car stereo problems can be when an amplifier goes into protection mode. If the amp goes into protect with the RCA cables plugged in, go to step 4. I changed it only to find my amp in p Most remote wires are BLUE. If you discovered a problem with your amp’s internal wiring with the multimeter in step 3, you likely won’t be able to fix it on your own. This is sometimes difficult to check unless you know how the input circuitry of the amplifier is designed. Even so, following these six steps will get you through 90 percent of cases. If it starts right up as normal, the problem is in the speaker — your amp has just shut down to protect itself. When something goes wrong in the amp’s wiring, the protection circuit trips, shutting down the entire amp to keep the problem from getting worse. Some amplifiers have multiple protect lights. If the amp goes into protect with no RCA or speaker cables connected to it or if the amplifier blows the fuse AFTER remote voltage is applied, the amplifier likely has shorted output transistors. If the amplifier goes into protect with the RCAs plugged in (but all speaker wires disconnected), there could be several problems. If you can’t turn your amp’s power light on even by pressing the button, you might be in protect mode. THIS link takes you to a page where it's explained in detail. If there's a question, pull the fuse from the holder and measure the resistance across it (set meter to ohms). Sometimes, the connection is intermittent so you need to move the RCAs while you're checking to insure that the connection is solid. Look at the silkscreen on the amplifier to confirm the function of the LEDs. When you buy via links on our site, we may earn an affiliate commission at no cost to you. If you can’t turn your amp’s power light on even by pressing the button, you might be in protect mode. We want to warn you at the start: Unless you’re a trained electrician with access to a fully-stocked workshop, you won’t be able to personally fix every power protect fault. Many amplifiers show protect when initially powered up (mute delay) and then switch to green. Good luck! Generally, when the fuse holder melts, the contacts become badly oxidized and the clips lose their tempering. This means that you must confirm that you have sufficient voltage reaching the amplifier for it to operate properly. At every point where there is a green indicator, you should check the voltage. 10 Best Car Stereos Under $200 in 2020 – Reviews & Top Picks, 10 Best 3-Way Car Speakers of 2020 – Reviews & Top Picks, 10 Best 8-Inch Car Subwoofers of 2020 – Reviews & Top Picks, What color the protect light is supposed to be, If the protect light blinks in code to tell you what the problem is. The image below shows a terminal block that melted because the set screw wasn't tight enough on the wire (this is very common). For the most part, this page is for amplifiers that go into protect mode and remain in protect mode or go into protect mode when the amplifier is driven hard. If the amp only goes into protect when one particular speaker is connected to the amp, you have a defective speaker. 5. Either 1. It’s not a blue screen of death. If the amp only shuts down when the amplifier tries to produce high power (when it hits a strong note), you need to measure the voltage at the time when the amp shuts down. The remote wire from the amp has to be connected to the HU's remote wire. To solve a grounding problem, clean your grounding wires, then reattach them more tightly to a location in your car where you’re certain they won’t rattle loose. Your remote wire (blue wire) is grounded out somewhere. If you don't know how they're supposed to behave, ask around. Just check what sequence the light is blinking in, look in the manual to see what it means, then skip ahead to where we talk about solutions. If the amp powers up after disconnecting the speaker and signal cables from it, try reconnecting the RCA cables. Your ground wire to your amp has a loose connection. Some may have a different strip on it. If your amp isn’t a code-talker, it’s still important to understand what its lights are saying at all times. These amps indicate protect mode by blinking the power light before shutting down completely. One of the more common things we come across when troubleshooting amplifier installation problems related to remote turn on is when the amp will not turn on (often a result of not running a remote turn on wire at all or connecting it to a wire that doesn’t receive voltage when the ignition is … Step 6: Unplug the amp from the head unit. Normally, both will be above 12v. DecibelCar is reader-supported. - General Information Amp: RF bd1000.1 subs: RF 12 HX2 (2) Headunit: Stock (2005 Mercury Mariner Premier) Issue I just hooked this system up and it was working fine for about 1 day until I popped the fuse. You first need to check the RCA shields of the head unit. It's important that you leave your head unit on during testing so that the remote line will have voltage on it, the amplifier will be on, and the amplifier will be drawing current. It will help you troubleshoot many amps down to the component level. Check that out carefully. Sometimes it switches the red LED off and switches the green on (Planet Audio, Power Acoustik and similar amps). The first thing you need to check is the on-board fuses plugged into the amplifier (if it has them). Amplifier Protection Mode Troubleshooting . If you read more than 0.01v and the amp is at idle, you may have a bad ground. To know how low your meter reads at 0 ohms, touch the leads together for 5 seconds. Here are a few of the most common. If by any chance the HU's remote power is blown, you can use cig lighter's power wire. Touch the black meter probe to the ground terminal of the amp and the red meter probe to each of the RCA shields. Sometimes the voltage will only drop when current is being drawn from the power source. If any of them read less than 11V with your car’s engine off, or 12V with it on, there’s a problem with the internal wiring — something that should be delivering power isn’t doing it. For example, some of the Sony amplifiers have lights for power, overcurrent and thermal protection. You’ve probably thrown a circuit breaker in your home before — it’s exactly the same principle, though a little more complicated in execution. Since the meter leads are not long enough to reach the grounds at the battery or trunk over the long run of the power wire, you need to scratch the paint/primer/undercoat to bare metal at each point where you need to check the voltage. This article is designed to help car audio beginners understand and deal with one of the most frustrating things that can happen to any amp: the system shutting down and the “protection” light turning on, seemingly for no reason at all. Of American muscle cars and European Audio equipment on our site, we may an! 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