1948 Chevy 3100 truck
Turn signals- Turn signals were added to my truck at some time and the prior owner said they did work but they don't now. Any advice before I go searching; Is there an inline fuse or a flasher unit?

Heater blower motor- Same thing I do not hear a motor when I use the heat switch; is there an inline fuse? My truck has had the vintage A/C installed so it blocks the blower. I see no control of any kind for this A/C or compressor, etc. How does it work?