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Pat1USMC · 05-05-2021, 05:15 PM

Well I’m at a loss. I have a 1998 Boxster. I thought I had made the headunit swap as easy as it could be. I literally only swapped one aftermarket Alpine headunit for another! Same harness, same 4 RCA plugs, same radio antenna. The headunit powers and works just fine, but there is zero sound coming through the speakers!

I have never had a problem with the first headunit (just wanted Bluetooth capability). It appears to be wired professionally for the first aftermarket Alpine unit but that was with the PO.

This is what I have done for troubleshooting:
-check and replace fuses for stereo and sound. They weren’t blown I just wanted to cover all my bases
-replace stock amp
- disconnect/reconnect negative battery terminal
- the open the drivers door, lock the car, close the door procedure
-drove the car and shut it down. Twice.
-I even put the 1st headunit back in! Still no sound.

Is there something I’m missing that Porsche has installed to prevent headunit removal? This is driving me nuts!

05-05-2021, 05:15 PM	#1
Pat1USMC Registered User Join Date: Aug 2007 Location: NorCal Posts: 39	No sound through speakers Well I’m at a loss. I have a 1998 Boxster. I thought I had made the headunit swap as easy as it could be. I literally only swapped one aftermarket Alpine headunit for another! Same harness, same 4 RCA plugs, same radio antenna. The headunit powers and works just fine, but there is zero sound coming through the speakers! I have never had a problem with the first headunit (just wanted Bluetooth capability). It appears to be wired professionally for the first aftermarket Alpine unit but that was with the PO. This is what I have done for troubleshooting: -check and replace fuses for stereo and sound. They weren’t blown I just wanted to cover all my bases -replace stock amp - disconnect/reconnect negative battery terminal - the open the drivers door, lock the car, close the door procedure -drove the car and shut it down. Twice. -I even put the 1st headunit back in! Still no sound. Is there something I’m missing that Porsche has installed to prevent headunit removal? This is driving me nuts! Last edited by Pat1USMC; 05-05-2021 at 05:20 PM.