Over christmas break i wired an amp with one sub in my car, worked great for the month i was home. I went back to school in january without my car and came back 3 months later and the subs dont work. The led light is red, I've checked preamp issues, (fuses, pinched wires, ground), even switched the fuses even though they were fine and still have the same problem. Im hopin its not an internal issue with the amp so hopefully someone can help
Disconnect all input and output cables and check. If the light stays red, it suggests an internal error. If not, proceed by first connecting the Sub wires and checking, then the input RCA's and checking. Remember to switch off the system before connecting/disconnecting, I suggest also removing fuses during this process.
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You will need to ask your question of the electric power utility which supplies the school with electricity (in South Africa?)
Perhaps the rate for electricity has increased drastically lately. Have you compared the usage from the previous month (kilowatt hours) with the same time period the previous year? If the usage amount from 12 months prior is similar to the usage amount in the previous month, then it is clear the rate per kilowatt hour increased significantly. I am answering from the USA where we receive advance notices of electricity rate increases.
Or, has the usage amount (kilowatt hours) increased greatly? If the usage amount increased significantly, then, there has been an increase in electricity consumed. Have more electrically-run computers or other equipment been added in the school? Are school staff and students recharging their personal portable electronic devices with school electricity and not at home? Is there suspicion that someone or some entity is pirating school electricity?
By the way, Fixya.com is intended as a website for questions and answers on how to go about REPAIRING _THINGS_. Plus, your question landed in a Fixya category for Computers & Internet and not one relevant to electric power utilities.
Many cars have the cooling fan on a thermostat or time delay, to allow it to run for a short period of time after the engine turns off, to cool the engine off. You may have just never noticed it before. So I wouldn't worry about that. Your real problem is the blowing fuses, apparently you have a short somewhere in your wiring. Putting in bigger and bigger fuses is a great way to set fire to your wiring harness. It's possible that the wire is pinched or chafed somewhere, and perhaps when you hit a bump just right, it touches and shorts. You may have to take this to the Chevy dealer or a GOOD independent shop to have them chase it down. Unless someone out there knows exactly what this is, it could be a tough one to find.
Check the speaker wire first, get another speaker to see if it works (may have blown yours) or get another signal to plug to the speakers tosee if the play. Also check the RCA's and make sure your signal is getting to the amp