My son has a 89 4 runner the park lights kept coming on by them selves in the cold.Now they will not come on at all. Any suggestions or diragrams a fella could look at. Thanks

 

Hmm.. The easiest option would be to start tracing wires, look for any kinks or stripped wires. Was the truck worked on near the time the lights started comming on, or when they stopped comming on at all?

(stupid question I know) Did you check the bulbs when they went out?