[Steeveedee]

The yellow wire provides power to the coil through the solenoid when cranking the engine to start it. If you tie it off, you may have a lot of cranking since you won't be powering the coil. You'd have to get it spinning and let the ignition catch when you let go of the key. I get around this by using a remote solenoid from a competing automotive manufacturer to provide power while cranking.