Ultimate 3rd brake light and antenna mount - Dodge Cummins Diesel Forum
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post #1 of 12 (permalink) Old 12-10-2019, 11:28 PM Thread Starter
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Ultimate 3rd brake light and antenna mount

I needed a good antenna mount and I wanted to replace my 3rd brake light. Another thing I have had issues with as well as other people is leaking water behind the 3rd brake light.

This monster from GJ Motorsports is made from a huge chunk of solid aluminum and comes with a thick rubber gasket shaped to it to seal it up nicely to the cab. it uses BAJA S2 lights so you can change the lenses to any color you want, amber, red, white etc

I opted for red lenses and I got the full wire harness package that makes the lights work as turn signals, brake lights, and tail lights all in one. I can also manually turn them on at anytime and there is also a strobe function but cant imagine anyone could ever use that unless they were emergency personell

The cost seems expensive until you realise the cost of BAJA lights and a similar 3rd brake light its actually reasonable.

Also of course it gives me the perfect NMO antenna mount for my HAM radio

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2015 Cummins 2500 Laramie Deleted 6" lift 37" Nittos
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post #2 of 12 (permalink) Old 12-11-2019, 12:39 AM
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Not worried about having a small ground plane?

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post #3 of 12 (permalink) Old 12-11-2019, 12:43 AM Thread Starter
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Not worried about having a small ground plane?
I considered it but after testing and signal checks 30 miles away im pretty happy with it

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post #4 of 12 (permalink) Old 12-11-2019, 01:12 AM Thread Starter
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I installed my Yaesu 400XDR under the passenger seat and mounted the head overhead with just a single hole in the headliner and a screw and washer
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post #5 of 12 (permalink) Old 12-12-2019, 01:13 PM
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Not worried about having a small ground plane?
Wouldn't the top of the cab be the ground plane? As I recall, the signal would be stronger towards the bulk of the ground plane, which would be forward.

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post #6 of 12 (permalink) Old 12-12-2019, 01:16 PM
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Quote:
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Quote:
Originally Posted by Strikerfired View Post
Not worried about having a small ground plane?
Wouldn't the top of the cab be the ground plane? As I recall, the signal would be stronger towards the bulk of the ground plane, which would be forward.

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Figured centered more on the cab would be ideal; current position is missing out on about 50% of the metal.

If it works, it works.

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post #7 of 12 (permalink) Old 12-12-2019, 02:33 PM
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Figured centered more on the cab would be ideal; current position is missing out on about 50% of the metal.

If it works, it works.
It would definitely be better centered on the cab. I did just that on my old '02 2500 QC. I'm too skeered to drill my '15 2500 MC.

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post #8 of 12 (permalink) Old 12-12-2019, 11:56 PM Thread Starter
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Yea that's the thing, I know the center of the roof is the ideal spot but I didn't wanna drill my roof, plus I have a sunroof. That's why I liked this idea of a mount built into this light, gives a pretty good mount and so far has proved to work pretty damn good as far as signal strength
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post #9 of 12 (permalink) Old 12-13-2019, 02:06 AM
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It's definitely one of the best non-drill alternatives I've seen. Better than a hood/fender mount setup because the antenna is now above the cab. I was thinking of paying attention to which direction my sliding rear window opens and using a Larsen KG2/70CXPL glass mount. I used a Panavise mount in my '02 for my Kenwood TM-V71A faceplate, but I don't like the idea of screwing through plastic at the cubby to the right of the climate control on my '15.

https://www.pulseelectronics.com/dow...r_catalog_/pdf

https://www.panavise.com/pdf_indash/75105-513.pdf


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post #10 of 12 (permalink) Old 12-13-2019, 10:04 AM
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Quote:
Originally Posted by 57buick View Post
Yea that's the thing, I know the center of the roof is the ideal spot but I didn't wanna drill my roof, plus I have a sunroof. That's why I liked this idea of a mount built into this light, gives a pretty good mount and so far has proved to work pretty damn good as far as signal strength
I bonded all of my body panels together and to the frame with 3/4" braided ss. Makes the whole truck a ground plane. I have a yaesu hf/vhf/uhf rig with two antennas. A Larsen 2/70 and a little Tarheel.

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post #11 of 12 (permalink) Old 12-13-2019, 12:06 PM
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Wow! It's possible to option that third brake light assembly up to $1007! Yes! More than $1k! Not a typo!

I am in no way ... no shape ... no condition... no standing .... in any position to offer any negative commentary on the cost of Gen 4 Ram accessories. I'm not doing that. I just had no idea at all such a thing existed. Kinda surprising given how hard I've looked for things to buy for my truck.

I've seen guys with rear-cab or rear-body mounted, or separate pole-mounted antennae install an aluminum or copper disk below the antenna proper. I assume that's a small ground plane to enhance at least the main pattern lobes. Could you add a half-disc projecting aft to make up for any apparent loss in gain backwards?

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post #12 of 12 (permalink) Old 12-13-2019, 12:13 PM
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Very clean install looks good 57buick.

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