Turning the key sends power to the solenoid and the solenoid sends power to the starter. If the engine cranks, the solenoid is OK. If not then checking the solenoid is a good idea.
could be the starter or the solenoid, they arer pron to heating up especially when using headers, peace
Sounds like you might have a bad starter relay.
Have you checked the air filter? Fresh Gas? Battery amps?Does the starter spin and not engage? If so it is your starter solenoid.
If your 1999 Ford Mustang cranks but won't turnover you may have a problem with the starter, the solenoid, or the alternator.
It could be the starter solenoid
It depends on the kind of vehicle. If it's a ford, you might just need a solenoid. Some fords have an external solenoid, mounted on the drivers side wheel well. Some vehicles have a solenoid integral to the starter. In those you might need a starter.
No a solenoid switch (full name) does not control a cars electrical system. The solenoid is an electrically operated switch that sends power to the starter motor which in turn cranks the car's engine to start it. The reason a second (electrical) switch is needed to crank the starter motor, is that the starter motor requires such high voltage that the key would melt if all that power were to run through it. In other words; When you turn the key you are sending a small amount of power to the solenoid switch which in turn sends a large amount of power to the starter motor.
Its the solenoid (relay) that you are jumping. If i understand you correctly, it cranks when you cross the relay. Just ask for starter solenoid, and stick in on like the old one.
Weak battery? Loose or corroded battery cables? Bad ignition switch? Bad neutral or clutch safety switch? Bad starter? Bad starter solenoid?
Engine "Cranks" When Battery is ConnectedAnswer 1Defective ignition switch. Answer 2 - Another OpinionAlthough answer 1 is possible, over many years I've seen this incident occur several times, and after troubleshooting the circuit, the cause was determined to be that the "starter solenoid" [a relay switch] was "stuck" in the "closed"/ON position. If the starter solenoid is the cause, then replacing the solenoid will cure the problem, and a starter solenoid is a whole lot less expensive and easier to replace than an ignition switch!!!!!One way to "test" this theory is to temporarily remove the wire from the ignition switch to the starter solenoid. This wire is small in diameter, and usually connects by a "friction" type end terminal connector over a small threaded terminal [the terminal looks like a small screw sticking out off the side of the solenoid].On some brands of vehicles, instead of the friction connector, the wire may be secured to the solenoid with a NUT on the small, threaded screw terminal.To remove a friction type connector, just grasp the connector between the thumb and forefinger, and gently twist and pull. Where a nut is used to secure the ignition switch wire to the solenoid, a small wrench will be required.After removal of the wire, touch the battery cable connector to its battery terminal.Then, IF the starter cranks, the problem is that starter solenoid is defective and needs to be replaced. However, IFthe starter does NOT crank, then that suggests one of two possibilities:The wire from the ignition switch has become "shorted" to ground somewhere between the ignition switch and the solenoid, and the short needs to be repaired, or...The ignition switch has become defective and needs to be replaced.