I believe so. I got a resistor wired up and it works now. Basically, there needs to be a resistor wired in parallel with the antenna in reference to the signal (not power) and ground. I decided to do it on the dashboard side because I already had the dash pulled apart. But it shouldn't really make any difference. Here's what I did (ignoring the power to the antenna):

Tuner--(blue)---+---------(antenna)

                |             |

                |             |

             resistor    (ant. ground)-\

                |                       \

                |                        > (ostensibly, these are connected somewhere)

                |                       /

empeg--(black)--+--------(dash ground)-/

Which should sum up to:

Tuner--(blue)---+-----------+

                |           |

             resistor    antenna

                |           |

empeg--(black)--+-----+-----+

                      |

                   (ground)

The FAQ could be a little clearer on this.