Autotek mm4000.1 locked it protect

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If protect circuit to enefgize and began to work, surely there will be any fault [like short circuit at the output section] should be. contact any service technician. Never bypass any, might make things worse. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

check to see if all the speaker connections are in polarity ( all + to + connections and all - to - connections in their corresponding places)

also you could check to see if the speaker cables are not exposed and touching any metal surface from the amplifier to the point of where the speakers are installed, any contact would cause a short and force the amp into protect mode.
hope this helps, need any more help let me know
........andy........

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. . Double check all connections. Good luck.
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Hi.

The amp does not go on protection only because of wiring or power source problem , but also and mainly when there is an internal fault.

Protection is started whenever an out-of range voltage value is detected from the controller circuit.

Protection can be triggered from a burnt final IC or from a speaker wiring problem.

Since you have ruled out speake, wiring and power source problems, then this Amp is probably defective

If the Amp works fine on a different vehicle, then protection mode may start either because speakers impedance is not within Amp specs, or because the amp has a too big power draw. In this last case the problem is fixed installing a capacitor on the Amp 12V line.

Regards.

Ginko.

sounds like the protection circut of amp. check for solid ground and continous power from battery. Doed it get very hot?

make sure that your running heavy enough gauge wire from the battery to the amp. make sure wires to bridge the amp is correct and the av wires from the deck are the right gauge should be like 8 gauge wires.

for that amplifier, it is recommended that you are driving a 4 ohm load. It can drive a 2 ohm load, but will produce more heat and shorten the life of the amplifier. Is the subwoofer a single or dual voice coil? You'll want to make sure that you're not running below a 2 ohm load or you'll always go into protection. Also, try disconnecting the speaker wire completely from the amp so nothing but power is connected. If the amplifier is still in protection mode when no speakers are hooked up, then the amp is bad and will need repair or replacement.

recheck your ground make sure it has a good connection most of the time this is what it is

The most common reason for this is shorted output transistors. To confirm that the problem is in the amplifier, disconnect all speaker wires and the RCA cables. If the amp still goes into protection, check the DC voltage across the B+ and ground terminals. It should not drop below 11 volts. Also check the remote voltage.

If the amp continues to go into protect with no external connections (other than B+, remote and ground) and the voltage remaiins above 11v, the amp is defective.