Originally Posted By: schofiel
You probably have an active antenna that needs a power supply.


How does one determine if the antenna is active or passive? I installed a (Eutronix-built) PCATS tuner in my Wife's 2003 Buick Century and am experiencing the opposite of what you mentioned; Great FM reception but terrible AM reception.

The only thing mentioned in the vehicle wiring diagram was "antenna trigger".
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CLS