Tip & How-To about Ford F-100
You turn the key to start your engine and....
a series of rapid clicks. Your car won't start. What's going on?
That clicking noise is your starter solenoid.
Your starter needs a lot of power to turn your engine. That much power would melt your ignition switch in no time if it passed directly through it. So what happens instead is your ignition switch actuates another electric switch called a solenoid. The solenoid is a really HEAVY DUTY switch.
Inside it are two copper contacts that look like the head of a bolt only rounded. The battery is attached to one, the starter to the other. Hovering above them on a spring is a copper clad disk attached to an iron core. The iron core is inside an electro-magnet.
When you turn your key (in a perfect world), an electromagnet is activated that yanks the disk towards the contacts (Making a single decisive healthy CLICK). When they connect, the circuit is closed and the starter turns over. OK.
When things go wrong:
Posted by Justin... on
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