Jl audio 300/2 protection mode

[IAN160981]

Just wondering If anyone has had this problem with their JL audio amp and has any ideas on what the problem may be. The problem is that the amps "low ohm light" comes on after the amp starts up. The power light comes on when remote voltage has been applied but after 2-3 seconds the low ohm light comes on regardless if any speakers are connected and rca cables connected or not. When the amp goes into protection it still amplifies any input but only 25% of the possible output is heard. It also makes a high pitched noise from roughly were the power connections go in to the amp when the protection light comes on. When no input audio is connected the amp draws approx 15amps. Is there any reference voltages/resistance i can check to try and identify the problem.