1. Battery Check:
* Visual Inspection: Look at the battery terminals. Are they corroded or loose? Clean them with a wire brush and baking soda and water solution if needed, then tighten the connections. Corrosion restricts current flow.
* Voltage Test: Use a multimeter to check the battery voltage. It should read around 12.6 volts when not charging. A lower voltage indicates a weak or dying battery. Have it tested at an auto parts store for a more accurate assessment (they can test the CCA – cold cranking amps – to determine its health).
* Charging System Check: Start the car (if it starts, even briefly). The multimeter should show around 13.5-14.5 volts with the engine running. Lower than that indicates a problem with the alternator or charging system, preventing the battery from charging properly.
2. Starter Check (if battery is good):
If your battery is showing good voltage and the charging system is functioning correctly, the clicking could indicate a weak starter motor or a problem with the starter's solenoid. However, you're already hearing the solenoid click, indicating it *is* receiving power – this makes a faulty solenoid less likely than a weak starter motor itself, or a bad connection between the starter and its circuits.
* Tap Test (Caution!): With the key turned to the start position (don't hold it), gently tap the starter motor with a hammer or wrench. This *sometimes* temporarily resolves a connection problem within the starter. Be extremely careful to avoid any moving parts and electrical contacts. If this works, it points strongly towards a failing starter, but it's a temporary fix.
3. Other Potential Problems:
* Ignition Switch: A faulty ignition switch could prevent power from reaching the starter.
* Neutral Safety Switch: This switch prevents the car from starting unless it's in Park or Neutral. Make sure your automatic transmission is properly in Park.
* Wiring and Connections: Check all wiring connections to the battery, starter, and solenoid for looseness or damage. A corroded or damaged wire can interrupt the electrical circuit.
Should the starter be replaced?
If the battery and charging system are fine, and the tap test either doesn't work or only provides a temporary fix, then yes, the starter motor is a strong suspect and replacement is likely necessary.
How to replace the starter:
Replacing a starter is a moderately difficult job requiring basic mechanical skills. It varies depending on the vehicle, but generally involves:
1. Disconnecting the battery's negative terminal. This is crucial for safety.
2. Accessing the starter motor. This often involves removing some components like air intake parts, possibly the starter's access panel (there's often an access hole on the engine bell housing for the starter) or even the engine's lower shroud to reach the starter. You'll need to consult a repair manual specific to your 2002 Pontiac Grand AM.
3. Disconnecting the electrical connectors from the starter.
4. Removing the starter mounting bolts. These bolts can be difficult to access.
5. Installing the new starter. Reverse the removal process.
6. Reconnecting the battery and testing.
Recommendation:
Unless you have experience with car repair, it's strongly recommended to take your car to a qualified mechanic. Incorrectly diagnosing or attempting to replace the starter can lead to further damage or injury. A mechanic will have the proper tools, knowledge, and safety procedures to diagnose the problem accurately and perform the repair safely. A proper diagnosis will save you money and time in the long run.
