[mievil]

Disregard, I just saw a post in How To that identifies the routing under the wheel well.

I need to replace my antenna cable. The one from under the cowl to the actual head unit. Can anyone tell me how to get from the whip base to the interior? Does it go behind the fender or does it route into the hole where the cabin air filter gets the air?

 

[Just a Hunter]

https://www.thenewx.org/attachments/xterra-antenna-pdf.95137/

I would:
1. Follow the steps for unbolting the antenna from the fender.
2.Lift up on the antenna to provide access to the cable underneath it.
3.Snip the antenna cable at the point it attaches to the antenna.
4.Tape a 12ft line (I've used 100lb braided fishing line) to the antenna cord.
5.Go into the cab and pull your antenna cable out from the dash.
6.Return to your fender and securely attach your new antenna cable to your line.
Make sure the line is attached and taped to the cable inline as there is likely a grommet it will need to feed through. Having the line attached to the side could cause it not to feed through such points
7.Now you can insert your antenna cable into the fender hole and return to the inside of your vehicle to fish the cable back under your dash by pulling on the string its attached to.

 

[mievil]

Thanks but the current antenna cable doesn't exist. I have the mounting point and the mast but not a cable. That's why I'm trying to figure out where it is routed through.

Long story short I bought the vehicle and rats got into the cowl and ate the cable. So I have no idea how it is routed. It exists in the cabin and I can feel it go towards the fender behind the airbag but after that, no clue.

 

[Dukeofvegas]

I just added a GMRS radio and I ran the antenna wire to the drivers side and since I have an auto there is a 1" hole with grommet where the clutch would be. I'm not sure if the stock wire would reach that far and back but wanted to put the info out there.

Much easier to get to with nothing in the way.