Hi, I have a Kicker KX800.4 that has the power, ground, and remote all hocked to it. I have had this in the vehichle before, it was taken out and placed in another vehichle and now put back in the original. Every time I try to turn the amp on, the protection light comes on. It has never had a prob before and I rechecked all the wiring with a test light. Any ideas on what may be the problem or any test I can run to double check anything. Any help would be appreciated. Thanks!
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Disconnect all the wires except the three main power wires, ground, 12v battery and remote. Now, turn on your radio, if the protect light is still on then there's an internal short in the amp. If the light turns green, then there's a short in either the auxiliary cables or the speaker outs. If it turns green, then troubleshoot the other wires that plug into the amp by connecting them one at a time until the protect light comes on, which will tell you that there's a problem with that speaker/aux wire.
1st check all of your wiring, make sure the remote wire is hooked up, check to see it the RCA's are hooked up. I know this sounds stupid, but i've done it a thousand times, check to see if you hooked up the speakers. If you checked all of those and still nothing, double check your ground. Make sure where you have it grounded, you have all the paint sanded away and its a good grounding point. The red light on the top of the amp, its not a protection light is it??
try hooking up only the power ground and remote see what happens if protection light is on then u have a problem with amp if it goes off then hook up rca if still off then hook up speaker wire if it turns on then u have a prob with speakers
TRY TO POWER THE AMPLIFIER UP WITH NO RCA INPUTS AND NO SPEAKERS CONNECTED. IF THIS PROBLEM IS STILL PRESENT, THEN THE AMPLIFIER WILL NEED SERVICE. KEEP IN MIND THAT YOU STILL NEED TO VERIFY THAT YOUR POWER CONNECTIONS ARE SOLID, NO LOOSE GROUNDS, ETC. ALSO, IF YOU HAVE A VOLTMETER, MAKE SURE THAT YOUT REMOTE LEAD HAS APPROX. 12 VOLTS MEASURED FROM GROUND. SOMETIMES A SAGGING REMOTE LEAD THAT HAS LESS THAN 11 VOLTS CAN CAUSE A GOOD AMPLIFIER TO EXHIBIT THESE SYMPTOMS. AFTER ALL, IF THE AMPLIFIER STILL DOES THIS, THEN THE PROTECTION CIRCUITRY IS SEEING ONE OF THE THREE TYPES OF FAULTS WITHIN THE AMPLIFIER AND IS SIMPLY SHUTTING IT DOWN. SOMETIME AFTER WHICH IT TRIES TO POWER UP AGAIN, ONLY TO SEE THE SAME FAULT, THUS REPEATING THE CYCLE CONTINUOUSLY, INDICATED BY THE POWER LIGHT GOING ON AND OFF. LET ME KNOW IF YOU NEED MORE ASSISTANCE....V
Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty .
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With your multimeter set to DC volts, the black meter lead on the ground terminal of the amp and the head unit on (so the amp will have remote voltage applied), touch the red lead alternately to the B+ and remote terminals of the amp. Does the voltage on either the B+ or remote pulse below ~11 volts when the LED flashes?
Generally, when an amplifier goes into protection when you attempt to power it up, it means that the output transistors have failed.
Measure the DC voltage across the B+ and ground terminals as well as across remote and ground. If you have less than 11 volts when the amp tries to power up, the amp could be shutting down due to low voltage.
If the voltage remains near or above 12v, disconnect all speaker wires and signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down, the amp likely has blown output transistors.