Running coax from mirror mount

If you are going to run it in place of the factory stuff, you'll have to cut the connector off and have it reattached after you run it. Can you run it into the engine compartment then thru the firewall. That's what most are doing on the Cascadia.

 

Some of the K-40 coax connectors come apart... check the connector.
My does but my is and old K-40.

 

Most of the factory coax cables are rapped with all the electrical wires and are not shielded or grounded very well at all. Volvo are the prime example of doing this wrap the coax somewhere in the wiring harness bit. In most cases you will spend many hours trying to unwrap all the wires just to find the coax, so many people just leave it and cut the ends off.

I find coax with copper shielding works the best.
Any alumni shielding is usually cheep junk(my opinion)

Ground wires are a must, not every part of the truck is grounded and you need good grounds to have a good system.

Remember that a magnet mount need a good base with high iron content to stick too, if you cab body is alumni with no iron in it, it is not going to stick at all.

You may have to bolt on a iron or steel plate and ground it to the battery directly if worse comes to worse.

It is very important the SWR low as possible and below 1, 2 is a sign of danger, anything past 3 and you could pop a component on the board on you radio not work any more.

 

You need to let somebody (cbshop) install the PL259 properly. It should involve solder.

 

Adding the jumper into the mix could also mess things up as well when you are talking about antenna's as it could actually raise your SWR. Would be better to cut off and have a new end put on. Also remember the shorter the length of wire with some service slack from antenna to CB the better as having excess length will raise the SWR as well.