I know CB installs have been covered in the past but here's my set up. I have basic knowledge of wiring, cbs, and tools so I don't claim to have the PERFECT or BEST set up out there. If you see something that could be improved please let me know....
Cobra 18 WX ST II (~$65 amazon)
3' Firestik using (~$25 amazon)
Teraflex Tailgate Mount (~$20 used)
18' Astatic Coax (~$16 ebay)
Astatic SWR/POWER meter with 3' jumper cable (~$20 ebay)
Firestik Heavy Duty Stud Mount (~$13 amazon)
10' of 3/8" plastic wire Conduit (~$8 auto parts store)
30 Amp In-Line water "proof" Fuse using 10Amp fuse however (~$4)
12 guage wire, connectors for cb mount ground, power to battery, cb ground, etc. (~$15 car parts store)
(OPTIONAL: Switch and Relay setup add another ~$10 for parts)
EXTERNAL SPEAKER OPTION: add $10-$20 for having a speaker in sound bar or under dash for example
TOTAL PROJECT COSTS (estimated): $186
sockets, wire crimper, circuit tester
electric grinder or Dremel tool for cutting plastic and metal around glove box
To get power from the battery to the CB run a wire clothes hanger through the firewall using the hole with foam behind it. Once you're through then tightly tape your wire to the hanger and pull back through. MAKE SURE TO put plastic wire Conduit around your wire that touches any metal to protect it from wearing through the wire coating:
Eventhough your CB probably will have fuse(s) inline from the box it is a good measure to put an in-line fuse right off of the battery and before the firewall for easy access to kill power to the CB if needed or to prevent overheating and fire through your wiring...i used:
Now since CB's are different sizes and shapes its up to you on where and how to mount it. I chose to hide mine in the glove box. It was a bit of a pain to get it to fit right. I did have to cut part of the bottom of the box out. I also had to cut some metal bracing to clear the wires on the bottom and the top.
I still have room for a few things in the box on top of the CB. It can be locked up and unseen by anyone passing by when my doors/top are off. I just used velcro on the CB mount and the box to keep it from sliding around.
Hold off connecting the power to the CB until you have your antenna mounted and installed to your Coax so you don't "burn" it up.
Run your quality COAX cable to the back of the Jeep under the carpet is easiet. 18' was a pre-cut length I could buy and worked out just fine. Again protect any parts of the wire that may be close to rubbing on any seat mounts with the plastic wire conduit. Make sure to not have any harsh bends in the wire because that can affect it's performance. So keep it in "smooth" bends around things. I try to avoid speaker wires as much as possible too so you dont get any "feedback"
If using a spare tire cb antenna mount, remove the spare and install the mount. Here's my teraflex mount. Notice the heavy duty antenna stud mount. I scraped a small portion of the mount's coating off of the bottom side (NOT THE TOP OF THE MOUNT) and then a bit off of the bottom bolt so I could attach a ground wire:
Once you have the mount on I would test the continuity with a circuit tester. The continuity should match this: CONTINUITY FOR CB ANTENNA MOUNT
Use the metal hanger and tape trick again that was used for running wires through the firewall for feeding the coax through the tailgate and out of the hole already there in the tailgate:
Run your ground wire and COAX through the stock tail gate wiring space. The black cover just pops out with a little pinching on the top and bottom. Cover wire in conduit that wire tire to stock wires (the 2nd pic shows the green GROUND wire and i did not keep it Tight like it looks....it should be loose enough to move freely when the door opens and closes):
Reinstall the rubber grommet on the tail gate. Cut an X in the center and then shove the COAX and Ground wire through it. Then pop the grommet back onto the tailgate. Reinstall the plastic wire cover on the inside of the tailgate once you have the wires ran and secured.
Connect the Ground Wire to the nearest grounding location. I used the cargo tie down mount nearest the tailgate hinge. I just ground off a little of the paint to gain a good ground.
Connect the ground and COAX to the antenna mount. Install antenna.
Tuning in your antenna is VERY important and will make your CB last longer and you'll hear and talk further. Using an SWR meter will make this happen!
The following was found on offroaders.com
Equipment needed: SWR meter, short jumper coax 3 foot.
Procedure: The SWR meter needs to be placed in line between the antenna and the CB. Connect the antenna (normally connected to the back of the CB ) to the connector marked "Antenna" or "Ant" on your SWR Meter. Connect one end of the short jumper coax to the "transmit" or "Xmit" on the SWR meter. Connect the other end of your jumper coax to the CB.
Assuming you have a standard SWR meter the switches should read as follows: REF or SWR, FWD, and there should be a slide switch marked "set" or "Adjust". If different consult your meter's owners manual.
With the radio on the lowest channel (1 on CB) and the SWR meters switch in the Forward (FWD) position, depress the transmit switch (key up) located on the microphone. While holding the unit in this transmit mode, adjust the meter needle to the set position using the Set or Adjust knob on the meter. As soon as the needle is in alignment with the corresponding mark on the meter face, flip the switch to the Reference (REF) position. The meter is now showing your SWR on channel one. Note the value and quickly release the microphone switch. Record this reading.
Repeat the previous step on channels 19 and 40.
How to read your results: If SWR on channels 1, 19 & 40 is below 2.0, your radio can be operated safely.
If SWR on all channels is above 2.0 but not in the "red zone" (normally over 3.0), you may be experiencing coaxial cable reaction (bad quality, wrong length, etc.), insufficient ground plane, or have an ungrounded antenna mount.
If SWR is in the "red zone" on all channels, you probably have an electrical short in your coax connectors, or your mounting stud was installed incorrectly and is shorted. Do not operate your radio until the problem is found, serious damage can occur to your radio.
If SWR on the lowest channel is higher than it is on the highest channel, your antenna system appears to be electrically short. Your antenna length may need to be increased.
If the SWR on channel 40 is greater than that on channel 1, your antenna is considered to be "LONG" and reduction of physical height and/or conductor length will correct this situation.
more info on this at: SWR READING