I HAVE KAC-827 AMP THAT STILL WORKS BUT RED LIGHT STAYS ON WHEN CAR IS OFF WHICH MAKES AMP STAY WARM. FUSES ARE FINE. WHAT IS THE PROBLEM???

The red light you describe on your amp, is the protection mode warning light. An amp goes into protect for many reasons. Here's a checklist.

1st check the fuse (s) on your amp and make sure they are not blown.

2nd check the inline fuse next to your car battery (if you have an inline fuse)

3rd, disconnect the speaker wires with amp on, does the light go off?

4th check your ground, this may be ok if you have tried another amp with the same wires.

5th.if none of these turns the protect mode off, it may be an internal fault.

you may have blown transistors and it is a tricky job to repair and costly.

hi there
The reason for this is the ground is weak to the amp make sure that the post that your ground wire is screwed down to is tight also make sure that is touching bare metal if there is paint on bottom side use wire brush to get the paint off so it is bare metal a weak ground can mess the amp up and make it not work at all hope this helps you have a wonderful day

sdfd

fuse?

My best guess is that it would be your ground wire or even the power into your amp. I would check all the connections going to and from your amp

when you car is running, it charges the battery somewhat. So the voltage problem is not a problem. The red light means the amp is going into ''Protect Mode". This usually happens when something is wrong with the amp. Usually the amp is getting hot. Check all of you connectiong and check the final impedance of the subs. Make sure the amp can handle the impedance of the subs. If you need anymore help, message me.

that means you probably have a shorted speaker wire, a bad speaker or the amp itself is bad, try disconnecting the speakers one at a time and see if it turns on or not. if the red light stays on with no speakers hooked up it means the amp is bad

hi, note that if you are not using the proper gauge b+ and gnd cable with this amp then the current available at the amp wont be sufficint to keep amp on. also try using this amp while vehicle is idling. if this doesnt work then disconnect all spks from amp and check if red lite stops flashing. if it doesnt stop flashing then amp has internal fault. if lite stays on brite then proceed to check each spk load impedance, then reconnect each spk individually. the minute red lite starts flashing it will give you a clue that the channel or spk load is faulty. cheers

I do belive this amplifer has a red light when it is on... I know my Kenwood does. I suggest checking all your wireing between your amp and your speakers, check the impediance between your positive and negative terminals on your leads to the subs.

try using a better ground. while new cars are great, they also have more paint and plastic in the works...so finding a good ground for your amp to run off of isnt always easy. you can try running a gbround cable straight to the negative terminal of your battery to test the amp, poor grounding is the most comon cause of amp failure. ps,the fan may be staying on as a protective service, as if your amp loses ground whenpowered up it will keep the cicuit boardfrom heating up on voltage surges.