Here's a breakdown of why and what to check:
* Brake Pedal Switch: This switch is activated when you press the brake pedal. It does two things:
* Turns on the brake lights: A faulty switch means no power to the brake light circuit.
* Allows the car to shift out of park: Many automatic transmissions require the brake pedal to be depressed before shifting out of park to prevent accidental movement. A failed switch prevents this.
* Neutral Safety Switch (also called Park/Neutral Switch): This switch is located on the transmission and ensures the car won't start unless the gear selector is in Park or Neutral. It also plays a vital role in allowing the car to shift out of Park. A faulty switch can prevent shifting and may even prevent the car from starting (though it sounds like your car *is* starting).
Troubleshooting Steps:
1. Check the Brake Lights: Have someone press the brake pedal while you check the brake lights. If they don't work, the problem is likely the brake pedal switch itself or its wiring.
2. Inspect the Brake Pedal Switch: Locate the brake pedal switch (usually on the brake pedal assembly). It's often a small switch with two wires connected to it. You can visually inspect it for damage or try to wiggle it to see if it makes a difference to the brake lights. Testing it with a multimeter (checking continuity when the brake is pressed) is ideal.
3. Check the Neutral Safety Switch: This is more difficult to access. You'll likely need to get under the car to locate it on the transmission. Access varies depending on the exact model. Again, a multimeter can test the switch's functionality.
4. Wiring: Check the wiring harness leading to both the brake pedal switch and neutral safety switch for any broken or corroded wires.
5. Fuse: Check the fuse box for any blown fuses related to the brake lights or transmission.
Important Considerations:
* Safety: Don't work under the car without properly supporting it. Use jack stands, not just a jack.
* Professional Help: If you're not comfortable working on your car's electrical system, it's best to take it to a qualified mechanic. Misdiagnosis could lead to further damage.
The most likely culprit is either the brake light switch or the neutral safety switch, but a thorough check of wiring and fuses is also essential. The fact that both problems occur simultaneously strongly suggests a connection between these components.
