* Battery Positive (+) Cable: This large gauge cable runs directly from the positive (+) battery terminal to the starter's main power terminal (usually the largest terminal on the starter).
* Ignition Switch: This is the brain of the operation. When you turn the key to the "start" position, it completes the circuit allowing power to flow.
* Small Starter Wire (from Ignition Switch): A smaller gauge wire runs from the ignition switch to the starter solenoid. This wire provides the low-amperage signal to engage the solenoid. This wire is often a single wire and is often easily mistaken for just being connected directly to the starter, rather than the solenoid. *The solenoid is the small metal box attached to the starter*.
* Starter Solenoid: The solenoid is an electromagnetic switch. The small wire from the ignition switch energizes the solenoid, which in turn closes a heavier contact, allowing the large current to flow from the battery to the starter motor.
* Starter Motor: This is the actual motor that cranks the engine. It receives high amperage power from the battery through the solenoid.
Simplified Explanation:
1. You turn the ignition key to "start."
2. This sends a small electrical signal from the ignition switch to the starter solenoid.
3. The solenoid is energized, completing a heavy-duty circuit.
4. High amperage current flows from the battery, through the solenoid, and to the starter motor.
5. The starter motor cranks the engine.
6. When the key is released, the circuit is broken, and the starter stops.
Troubleshooting Note: If your starter isn't working, common problems include:
* Dead or weak battery: Test the voltage.
* Bad starter: This requires testing and/or replacement.
* Faulty ignition switch: This could be failing to send the signal to the solenoid.
* Problems with the starter solenoid: This could be failing to close the heavy-duty circuit.
* Corroded or loose connections: Inspect all connections for corrosion and ensure they are tight.
Without a wiring diagram specific to your 1988 Chevy Cavalier Z24, this is the most general explanation possible. A wiring diagram is highly recommended for accurate diagnosis and repair. You can often find these online through automotive repair websites or forums, or in a Haynes or Chilton repair manual for your specific vehicle. Remember safety first, disconnect the negative battery terminal before working on the electrical system.
