Question about 1991 Jeep Wrangler

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Will not start. power comes on but a clicking noise happens when the ignition turned on.

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That clicking is the solenoid. They do that when they don't get enough power to engage the starter.

Check for low battery condition. If you have someone that can give you a Jump, do so. If it starts, that pretty much will prove it.

Then comes the question: Will it start next time?
Something may still be wrong. The battery may be bad, the Alternator or both.

Drive to an auto parts store or battery dealership and ask them if they could perform a 'Load Test' on your battery.

By the time you get there it should be recharged. If you have a voltmeter on the dash, you should check the voltage while its running. +13-14 volts is normal and rules out the alternator

Hope this helps
Remember: Good things come to those who Rate

Mike

Posted on Aug 16, 2008

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Ignition switch on dodge dynasty?


I had a similar problem years ago. As long as your dash lights come on, it's likely you can use an external pushbutton switch to run the starter. There are likely just 4 wires on the ignition switch. Power from the battery, and switched to:
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Jun 01, 2015 | 1992 Dodge Dynasty

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Rapid clicking noise when trying to start the engine?


Hi There,

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:

Low Battery:
  • The solenoid requires power to actuate.
  • The starter takes a lot more power to turn the engine.
  • When the battery is low, there isn't enough power to do both.
  • You turn the key, solenoid engages (CLICK)
  • Power goes to the starter
  • The starter tries to turn the engine
  • The draw from the starter drops the available power below the minimum needed to keep the solenoid engaged.
  • The solenoid disengages
  • The starter is no longer drawing power
  • The additional power allows the solenoid to re-engage (Click)
  • Repeat the process for as long as you have the key turned. (CLICKCLICKCLICKCLICK)
That's where those clicks are coming from and why.

The remedy:
Short term - Jump start
Long term - Charge or replace battery.


I wanted to explain what was happening rather than just saying 'dead battery, replace it'. That way you can judge for yourself whats going on.

Best regards
Mike

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