I have a 1986 Chevy monte carlo ss i have headlights but nothing else when i turn the key nothing happens i have no door locks power windows turn signals or anything but head lights i keep getting told it is a ground issue but i cant seem to find the ground wires

Hello,
If nothing works but headlights then the first thing that I would do is check the starter wires, there are wires that connect to the starter called fuseable links, they are different colors and they have a small (1\2 inch approx) round cylinder shape built into the wire that have to have 12 volts at all times. (they are a type of fuse) that powers the car, without them some things may not work or start car. use a test light with the key on to see if the are good (12volts)

There are several ways to add more ground wires. If your battery ground cable is clean and tight, you can use 10 or 12 gauge black automotive wire and terminal ends to make your own grounds. Ground from the negative battery terminal to the engine. Ground from the negative terminal to the metal firewall behind the engine. Ground from the negative terminal to the chassis.