Had the same issue. Ended up cutting the cable a couple feet from the access hole at the base of the arch (coming from dash). Smeared a bunch of cable lube on the remaining cable and pushed from bottom while someone else pulled from top. If you just pull from either direction the cable will want to bind on the corner. At least that was one of the problems I had.
Don't forget to tie a chase string to the old cable end so you can pull new wire. Should be a much smaller diameter cable on new radar. Best of luck
jclark003, thank you so much. I pulled very hard at the access hold which was very difficult to do through the access on the starboard side, and I'm sure you would know. But, I didn't think about getting someone else to help on the other end. I couldn't budge the wire at the middle top of the arch whatsoever. You're right about the Garmin wires being smaller but there is two of them. I will get my son to help and see if your idea will work for us as well. I even thought about cutting a large access into the arch itself and then have a door so to speak. Since I am going to completely refinish the arch I could mask the hatch to that access, or so I would hope. I also thought about hiding the cables on top under the Bimini top, but once I get to the side windows I'm lost as what to do. I have had and worked on a huge amount of boats, but this one has frustrated me the most so far.
Anyway, thank you again for your help.
If you pulled hard from one end it's possible the cable is bound in the corner radius of the arch. If I remember correctly it the channel narrows the closer you get to the corner. If the cable is lodged in there you may need to reach in there with a cutoff broom handle or something to pry it out of the corner. Once done have your son gently pull from the top while you feed the cable from the bottom. If you can get several feet of slack moved up the arch with cable lube you should be home free. Cut the cable and pull the rest through.
Thank you again for your suggestions. I am taking a break until I can get my son to help. I will use your ideas for sure. It's really the first time I have felt clueless on something like this. I love this website and all the help one can get. We sold our Kadey Krogen which we traveled and live on for a while and I joined their Owners club during that time as well. Now that I'm back on Lake Michigan, it's Tiara and fishing for the rest of my life.
Thank you so much again.