fuse box, light problems. bulbs good, keep going out. I wiggle the fuse to work. on 2000 Suzuki Grand Vitara

Light's are a big issue with my car. Back up light never worked. Bulbs all are good. Now my head lights are a big problem. I found a burned/melted fuse. Changed it. Now the fuss seems loose. I have to get out and wiggle the fuse to get the light to work. It goes off and on.. In low beam it's like I have no lights. I'm thinking they need to be set up. I will do that when I have Lights. I'm not sure if I will need a new fuss harness. I live in Mexico and bought the car here. Is heat a factor. I notice lots of vehicles here have lights out, Help Please and Thanks

Crimp the connector so it make connection ..
Hi, Sorry, not sure what you mean. Do you mean the wires where they connect to each other. Thanks for your help. Carey