Electrical Problems

I bought a 1983 Diesel El Camino and since I got it I have had problems with the wiring. At first my glow plugs wouldn't warm up, and then when I fixed that I had no turn signals, and last night my headlights went out, any advice for me? I want to keep the car it runs great and has a great body, but I can not get a car electrician to touch it. any advice would be very much appreciated, thank you