I am chasing a short in the overdrive relay circuit. I have checked the wiring at the shift lever, replaced the relay and the solenoid. I'm now trying to read the wiring diagrams in the Bentley book. There is a common symbol in all of the diagrams that I can't figure out what it is. The symbol is a rectangle with a connection dot at each end inside the rectangle. They are inline in various conductors but are not numbered in the index. Any help will be appreciated.
Phil