Do your two connector look like this.
Ok.Here a picture of the four wire you need to test for an open in the circuits
Disconnect the connector at each in and test with a volt/ohm meter,should read .5ohm or less on each wire.
Let me know what else you need.
If all four wire test good you need to go to the dealer to see what the codes are in the radio and the amplifier.
Please push the accept button when were done.
Thank you for choosing just answer