I checked the fuses of my car and they are all good but still my reverse and turn signal lights don't work.

Help please. 1989 Ford Mustang LX 5.0
I checked the fuses of my car and they are all good but still my reverse and turn signal lights don't work.
Check for a fuse block under the hood also. There is a fuse block under the hood of my truck that I didn't know about and found out the hard and costly way.
I checked the fuses of my car and they are all good but still my reverse and turn signal lights don't work.
Check for corroded sockets.