New at amps. Please help with 2 channel.


New member
Username: Edpdx50

Post Number: 1
Registered: Oct-17
I have a Kenwood KDC-BT358U head unit that has been operating just fine. My Blazer is a little
Noisy because of old window seals so I bought a rear channel amp. It’s a Harman Kardon CA-212. Straight forward, I thought, but I am getting no sound from the rear speakers. It’s my first amp install, so I am not sure everything is correct. Can I get some help with the trouble, please?

Front L/R speakers still work right and are wired per schematic.
I disconnected the greens and purples from the HU that were attached to the rear speakers and attached them to the AMP- NO CONNECTION TO HU DIRECT FROM REAR SPEAKERS.
Front amp light comes on. Multimeter shows 12.6 at the remote lug on back of amp.
+B lug on back of AMP gets full 12v directly to battery (5amp fuse good).
Amp ground at chassis grounding bar â€" will verify solid connection.
RCA Line connectors verified to HU REAR L/R jacks.
HU wires not used: steering remote/mute/ant control/Green L/R and Purple L/R.
All HU functions otherwise intact. I have selected 6x9 rear speakers, and ALL speakers in the AUDIO SETUP of the HU.

What am I missing?

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