[Elkhunter]

Personally, I'd hook it up and try it prior to popping holes in my roof. Just my opinion

 

[Elkhunter]

so is that your issue? (he asks out of ignorance)

The Ridgeline has an amplified antenna and you're replacing it with a non amplified version

The antenna amplifier is part 6 in the parts diagram above (the "Module unit") and is located under the headliner in the rear....Heli it's right near the area where the antenna cable enters the vehicle near the third taillight

 

[Elkhunter]

(OhSix read the post right above your previous one)