As a rule of thumb, a starter-mounted solenoid has three terminals. As illustrated in the wiring diagram, the red wire connects to the large battery terminal on the starter solenoid, the purple wire connects to the 'S' terminal on the solenoid, and the yellow wire connects to the 'R' terminal on the solenoid. At the same time, some of the most commonly used solenoid wiring diagram symbols could be HSV1Y1 or VSVC1 -- Standard Solenoid Valve with Connection, HSV1Y1 or VSV1Y1 -- Open Solenoid Valve - CLosing, HSV1Y1A or VSV1Y1A -- Open Solenoid Valve - Closing According to Solenoid, and more.
