Please advise I am going to put newer seats in my 1967 144. I have a 2006 XC70 power drivers seat and need to figure out wiring so i can use the existing seat switches. I have the passenger seat wired and working, I made up subframes to mount the seats on. So thanks in advance for any and all help. Andy

One easy way to add a fuse to a wire is to put insulated female spade connectors on each end and connect them with a modern fuse.

In my 54 Chevy I use female spade connectors on all wire ends and join them with plastic insulated double male connectors.

Since access to bulbs is not easy on older cars, I add a connection under the hood or inside the trunk for troubleshooting.

Update I never got what I would call great wire diagrams, but i did disconnect the air bag and seat heating elements. with the use of the trusty volt/ ohm meter I was able to figure out how the original wiring should work. Then I figured out how to trick the seat into working without the intended rest of the 2006 volvo interfacing with the seat. I now have a power seat that fallows my every command by the switches on the side of the seat. I will fuse in a dedicated wire with a kill switch to make sure the seat only draws power when I want it to. when I am done with the installation I will post pictures. Andy