Do Not Ground the radio to the battery! Ground it to the truck frame if possible, but generally you can find plenty of brackets & metal under the dash that's already "grounded" to the frame. Only use stranded wires as a ground wire, not solid core wire.
My ant is centered on the roof about 1" in front of the hi-mount brake lite-coax thru the slider & tucked alongside the rear seatback, fed thru the seat mount bracket towards center of truck then forward between the seats using the floor mat to cover it. That leaves about 2 extra foot coax which can easily be tucked up under the dash . Be careful to keep the coax away from the seat track & the power tilt mechanism or it will get crunched. In the F250 S'Crew I ran it across the roof & down between the doors, zip-tied to the front seatback - after connecting to the radio-the rest is fig-8 looped & under the seat.
Cutting the coax to length & re-install the PL259 connector is easy- Radio Shack even has a screw together one so no soldering is required. Echoing Jolly Green's comment- some coax is junk- if it has a silver foil shield instead of braided shielding it crushes easier & makes it harder to replace the connector when you shorten it.

 

ill probably cut it. how do you run a braided ground wire, it has a normal wire coming out of it for ground?

 

I would also cut it to fit. You especially dont want coils because of the radiation.

Call me a cheater or just cheap, I used coax that was intended for cable TV. For a fraction of the price it was shielded. I only had to put on one connector because my antenna mount is a little different. It is a swivelling ball mount where you wire the hot and ground for the coax directly to the mount. I have gotten up to 7 miles with my setup. If your cable and antennas are not new, check for rust. I have 2 antennas that I switch out. I have a fiberglass antenna that I cut to make the truck 7'3"ish so dont rake everything I drive under and it works well enough. My other antenna is a 4 or so foot bullwhip, the one where I have gotten to 7 miles (measured linearly on a map). Right now the fiberglass antenna is broadcasting further because the threads on the bullwhip is a bit tarnished.

 

coax cable is all the same tv/satilite/ham radio/cb, it's a 75 OHM impedence

the diff. is in freq. used

if you use RG-6 QUAD you will be good to go, it's got a thicker wire running through it to handle higher freq. and a much better shield it's used in satalite and digital tv/internet

you can buy it by the foot at the slow depot and put on your own connectors.

i put mine on the back pas. side of the bed on the bumper to aviod the fuel pump and roof issues (6' fiberglass) ran the coax up the frame through the fire wall used 12 gauge stranded to the battery and put a filter on the power 6 inches behind the CB (kept it short thinking that it would pick up more noise b'tween filter and cb)

 

wrong the impedance is not the same

type
RG-6/U 75 1.0 mm PF 0.75 0.185 4.7 0.270 6.86 double Low loss at high frequency for cable television, satellite television and cable modems
RG-6/UQ 75 PF 0.298 7.57 quad This is "quad shield RG-6". It has four layers of shielding; regular RG-6 only has one or two
RG-8/U 50 2.17 mm PE 0.285 7.2 0.405 10.3 Amateur radio; Thicknet (10BASE5) is similar
RG-8/X 50 1.0 mm PF 0.75 0.185 4.7 0.270 6.86 double A thinner version, with the electrical characteristics of RG-8U in a diameter similar to RG-6
RG-9/U 51 PE 0.420 10.7
RG-11/U 75 1.63 mm PE 0.66 0.285 7.2 0.412 10.5 Used for long drops and underground conduit
RG-58/U 50 0.9 mm PE 0.66 0.116 2.9 0.195 5.0 single Used for radiocommunication and amateur radio, thin Ethernet (10BASE2) and NIM electronics. Common.
RG-59/U 75 0.81 mm PE 0.66 0.146 3.7 0.242 6.1 single Used to carry baseband video in closed-circuit television, previously used for cable television. Generally it has poor shielding but will carry an HQ HD signal or video over short distances.
3C-2V 75 0.50 mm PE 0.85 3.0 5.4 single Used to carry television, video observation systems, and other. PVC jacket.
RG-60/U 50 1.024 mm PE 0.425 10.8 single Used for high-definition cable TV and high-speed cable Internet.
RG-62/U 92 PF 0.84 0.242 6.1 single Used for ARCNET and automotive radio antennas.
RG-62A 93 ASP 0.242 6.1 single Used for NIM electronics
RG-174/U 50 0.48 mm PE 0.66 0.100 2.5 0.100 2.55 single Common for wifi pigtails: more flexible but higher loss than RG58; used with LEMO 00 connectors in NIM electronics.
RG-178/U 50 7×0.1 mm
(Ag plated Cu clad Steel) PTFE 0.69 0.033 0.84 0.071 1.8 single
RG-179/U 75 7×0.1 mm
(Ag plated Cu) PTFE 0.67 0.063 1.6 0.098 2.5 single VGA RGBHV
RG-180B/U 95 0.0120 in
(Ag plated Cu clad steel) PTFE 0.102 0.145 single Ag covered Cu VGA RGBHV
RG-213/U 50 7×0.0296 in Cu PE 0.66 0.285 7.2 0.405 10.3 single For radiocommunication and amateur radio, EMC test antenna cables. Typically lower loss than RG58. Common.
RG-214/U 50 7×0.0296 in PTFE 0.66 0.285 7.2 0.425 10.8 double
RG-218 50 0.195 in Cu PE 0.66 0.660 (0.680?) 16.76 (17.27?) 0.870 22 single Large diameter, not very flexible, low loss (2.5dB/100' @ 400 MHz), 11kV dielectric withstand.
RG-223/U 50 0.88 mm PE 0.66 0.0815 2.07 0.212 5.4 Double Silver plated shields. Sample RG-223 Datasheet
RG-316/U 50 7x0.0067 in PTFE 0.695 0.060 1.5 0.098 2.6 single used with LEMO 00 connectors in NIM electronics;
H155 50 0.79 lower loss at high frequency for radiocommunication and amateur radio
H500 50 0.82 low loss at high frequency for radiocommunication and amateur radio
LMR-195 50 low loss drop-in replacement for RG-58
LMR-200
HDF-200
CFD-200 50 1.12 mm Cu PF CF 0.83 0.116 2.95 0.195 4.95 low loss communications, 0.554 dB/meter @ 2.4 GHz
LMR-400
HDF-400
CFD-400 50 2.74 mm
(Cu clad Al) PF CF 0.85 0.285 7.24 0.405 10.29 low loss communications, 0.223 dB/meter @ 2.4 GHz[5]
LMR-600 50 4.47 mm
(Cu clad Al) PF 0.87 0.455 11.56 0.590 14.99 low loss communications, 0.144 dB/meter @ 2.4 GHz
LMR-900 50 6.65 mm
(BC tube) PF 0.87 0.680 17.27 0.870 22.10 low loss communications, 0.098 dB/meter @ 2.4 GHz
LMR-1200 50 8.86 mm
(BC tube) PF 0.88 0.920 23.37 1.200 30.48 low loss communications, 0.075 dB/meter @ 2.4 GHz
LMR-1700 50 13.39 mm
(BC tube) PF 0.89 1.350 34.29 1.670 42.42 low loss communications, 0.056 dB/meter @ 2.4 GH

 

Echoing jetech

Simple version hehe
tv and such 75ohm (normally)
radio 50ohm (normally)

75 ohm into a c.b. radio = bad things
Will it work, yes. Will it work well, no.

With the exception that some radios pre mid 70 ish were made to handle 75 ohms.

Since I'm a ham, I'm comfortable with making my own lengths of coax. So mine is cut to the lengths I need. Shorter the better. The longer the cable the more loss in the cable. nature of the beast, no way around that.