I have a 98 Lexus ES300, GREAT CAR! However, with the radio I have an aftermarket one which is a pioneer DEH-3900MP and when I turn it on the only bass I hear is coming from my speakers and none from the sub. I have tried connecting a little speaker to the wires coming from the amp to the subwoofer in the trunk to see if there were any juice coming to them and nothing. I am using the wiring harness for it and the one for the car which has 4 RCA plugs for the 4 speakers. On the back of the reciever there are 6 plugs 4 for speakers and two for the subwoofer which i am assuming is for the amp. I do not know what the problem is but I need help ASAP!
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