Need a few simple electrical questions answered...

ok i'm hooking up 3 new switches in truck for lights, acc. , ect
my 1st question
1......am i ok running 1 wire 14 gauge from an open acc. slot on factory fuse "under dash" add a circuit type of thing.....and splicing it to all 3 swtiches " for the switch led light"

2......doing the same for ground solder them all togther.....

3......and i want to run 1 (14 gauge wire for power to all 3 switches).....
note there will be only powering relays.......this will be to send power to the relays from the switches...

4.....where is the best place to penetrate firewall.......or should i drill new hole and use a rubber gromet.......

and has anyone cut out the area behind the sunglass holder " if so any tips?, did you remover the overhead thing or just cut it out in place....

thanks
scott

 

1st gens have a gromet thru the firewall already--I used it--Cable run-there was plent of room.
One wire for three switces--For relays--is OK.
Same ground--is good.

 

any word on sunglass holder mod?