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Old 05-17-2017, 8:29 PM
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Default Installing NMO Mounnt on 04 F150 with Sunroof

I was looking to install a VHF setup in my 04 F150. The only thing I am worried about is that my truck has a sunroof and I don't want to cut any wires while drilling. Dose anyone maybe have a diagram or someway for me to check for wires?
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Old 05-17-2017, 8:33 PM
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Are you going forward of the opening or behind it? Sometimes you can take the third brake light out and get a visual of what's in there. Removing the dome light and overhead console is another good viewpoint.

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Old 05-17-2017, 8:36 PM
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I don't. And in case you don't get any replies….

This is one of the reasons it is a good idea to pull down the headliner. Doing installs in sun roof equipped vehicles almost requires it, unless you have really good information that you can rely on.

I did an install on my wife's Escape with a sun roof. I had to pull half the headliner down and do a lot of measuring and checking before I felt comfortable drilling.

Other option is to go at the very rear of the cab, just above the center stop light. You can pull the center stop light out and visualize whats behind there.
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Old 05-17-2017, 8:56 PM
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the above the 3rd brake light IS the only option
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Old 05-17-2017, 8:58 PM
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Alright thanks for all the reply's! Sounds like I will just do it above the 3rd brake light since its the safest and easiest!
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Old 05-17-2017, 10:01 PM
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Have you looked into a Vehicle Specific Mount bracket where you can mount the antenna to a fender? (I've got two, one for VHF another for a scanner and am happy with them.)

http://www.theantennafarm.com/catalo...1ca68e28b6bb57
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Old 05-17-2017, 10:26 PM
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Quote:
Originally Posted by ofd8001 View Post
Have you looked into a Vehicle Specific Mount bracket where you can mount the antenna to a fender? (I've got two, one for VHF another for a scanner and am happy with them.)

http://www.theantennafarm.com/catalo...1ca68e28b6bb57
I have but I don't see one made for a 2004 F150. I see one for 2005-2008 F150's if that will work?
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Old 05-17-2017, 10:33 PM
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Well I just noticed the Antenna Farm is closed for a couple of months.

At any rate I think the mounts they sell are actually produced by Pro Fit. Here is a link to their site, which has contact information:

Pro.Fit International - Contact Us
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Old 05-17-2017, 10:37 PM
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Quote:
Originally Posted by dgruber View Post
I have but I don't see one made for a 2004 F150. I see one for 2005-2008 F150's if that will work?
You are much better off mounting the antenna on the cab roof, even at the rear, than putting the antenna down on the fender.
If you were willing to drill and install a proper mount on the roof, stick with that plan. It's a better solution.
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Old 05-17-2017, 10:41 PM
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Drill it!


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Old 05-17-2017, 10:56 PM
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Drill it!
Yes! Drill it, drill it indeed!
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Old 05-18-2017, 12:56 PM
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Quote:
Originally Posted by mmckenna View Post
Other option is to go at the very rear of the cab, just above the center stop light. You can pull the center stop light out and visualize whats behind there.
But then you do not have enough groundplane for a VHF antenna to work correctly. You need 19 inches in all directions.
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Old 05-18-2017, 12:58 PM
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Quote:
Originally Posted by cmdrwill View Post
But then you do not have enough groundplane for a VHF antenna to work correctly. You need 19 inches in all directions.


Well it's the same, if not better, than a fender mount. Plus easier and less likely to affect the sunroof.


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Old 05-18-2017, 1:16 PM
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Quote:
Originally Posted by cmdrwill View Post
But then you do not have enough groundplane for a VHF antenna to work correctly. You need 19 inches in all directions.
When I did the install on my truck, I was able to tape the mount to a long, thin piece of lath and reach over 19" forward through the CHMSL opening. I used a 3/8" NMO which was easier to push up through the hole and hold it in place while I screwed on the roof-side piece of the NMO.

Then it was a very easy matter to feed the coax down the B pillar from the CHMSL opening.

My truck is a Super Cab F-250 without the sun roof. I don't know how far to the rear the sun roof on the OP's truck extends when opened. If it's a Super Cab or Crew Cab, there may be enough space to get the mount forward enough on the roof for adequate ground plane.
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Old 05-18-2017, 2:46 PM
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Quote:
Originally Posted by cmdrwill View Post
But then you do not have enough groundplane for a VHF antenna to work correctly. You need 19 inches in all directions.
True.
However, same issue with the fender mounts. The additional drawback is that the cab is going to interfere, unless you space it far enough forward on the hood. However, it's still going to be physically lower than the roof mount.

I have mounted antennas like this on regular cab trucks. While not ideal, it does work and I had no issues getting the antenna SWR down low. The radiation pattern is no doubt funky, but again, same issue with the fender mounts.

Another benefit to mounting through the roof, as opposed to the bracket, is the underside of most NMO mounts are designed to be inside the vehicle, not outside and exposed to rain, road salts, oil, etc. Keeping the coax side of the NMO mount inside the dry vehicle will help it last a lot longer.
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Old 05-18-2017, 4:24 PM
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Quote:
Originally Posted by mmckenna View Post
True.
However, same issue with the fender mounts. The additional drawback is that the cab is going to interfere, unless you space it far enough forward on the hood. However, it's still going to be physically lower than the roof mount.

I have mounted antennas like this on regular cab trucks. While not ideal, it does work and I had no issues getting the antenna SWR down low. The radiation pattern is no doubt funky, but again, same issue with the fender mounts.

Another benefit to mounting through the roof, as opposed to the bracket, is the underside of most NMO mounts are designed to be inside the vehicle, not outside and exposed to rain, road salts, oil, etc. Keeping the coax side of the NMO mount inside the dry vehicle will help it last a lot longer.
True, Sir. Really "funky radiation pattern" for sure. One would want to get the NMO mount as far from the edge of the roof as possible.
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Old 05-18-2017, 4:39 PM
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I have but I don't see one made for a 2004 F150. I see one for 2005-2008 F150's if that will work?
That entirely depends on whether or not it is an 04 Heritage (on the 97-03 chassis) or true 04 (on the 04-08 chassis).

However I'd agree with the others, better to mount on the roof over the thrid brake light. Put it as far forward as possible (that you can see). I'd recommend leaving the sunroof open while you do this.
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