If a car will not turn over but the lights and radio still work, the problem is either a bad starter motor or a faulty ignition switch. A clicking noise when turning the key usually indicates a problem with the starter motor. No clicking sound and no sound from the engine can indicate a bad ignition switch. In both cases, the solution is to replace the faulty items.Know More
There are two main reasons for a car not starting. One is lack of spark, the other is lack of fuel. Lack of spark can be caused by a dead battery, a dead starter, a faulty ignition or bad spark plugs. A lack of fuel is usually the fuel pump or problems with the EFI system. A dead battery or alternator is fairly easy to diagnose because the rest of the electronic systems will either be dead or dim. A clicking sound means the starter motor is trying to engage, but failing. No clicking sound means that it is either the ignition or the starter solenoid.
Another possibility, unique to automatic transmissions, is that the car is in a gear other than park. Most automatics will not start in any other gear except park. In that case, the lights and radio would work, but the car would not turn over.Learn more about Car Parts & Maintenance
To replace a car’s ignition switch, one must remove the steering column, disconnect the wiring, test the switch, and install the new switch, according to DoItYourself. This task requires a replacement ignition switch, a test light, a screwdriver, a ratchet, wires and wrenches.Full Answer >
The most common cause of brake lights that remain on when the car is turned off is an adjustment problem with the electrical switch. Depressing the brakes activates the simple electrical switch that is located near the brake pedal arm and turns on the lights.Full Answer >
According to Popular Mechanics, a bad starter motor makes either a clicking sound or a high-pitched screeching noise when the ignition key is turned. A vehicle's engine cannot turn over or start properly without a functioning starter.Full Answer >
A car immobiliser disables one of the systems needed to start a car's engine, usually the fuel supply or the ignition. This is accomplished by RF identification between a transponder in the ignition key and a device called a RF reader in the steering column. The transponder sends a signal with a unique identification code to the reader, which relays it to a receiver in the vehicle's computer control module.Full Answer >