I initially tapped the rear speaker high level signal at the amp (green plug) but the sub was way light on base and hardly noticiable at full gain. Contacted Bazooka and they said you have to use the Low level RCA plugs. I said the factory HU does not have any RCA output. They said to tap into the low level speaker ouput wire and connect those to the harness RCA. Attached is pdf of of pics and wires to tap. The sub now performs as intended with plenty of bass.
