Question about 1992 Mercury Grand Marquis

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I hear a click clack sound under hood on right side by solenoid switch when turn ignition

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It can be several things. First, try unhooking and cleaning the Battery terminals and the Battery cables. Then reattach them and try starting your car.

If that does not work you need to test the Solenoid. Unhook the small wires on top of the Solenoid. Then take a Battery jumper cable and attach one end to the Battery cable nut on the Battery side of the Solenoid. Take the other end and touch the Terminal nut on the Starter side of the Solenoid. The Starter should spin. It will arc a little, but the engine should be cranking using the jumper cable to supply power. Remove the jumper and reattach the small wires.

Now you can diagnose the problem. Primarily you need a good Battery, if you could bypass the Solenoid and get the engine to spin at normal speed-the Solenoid is bad. If the Jumper cable really arcs and the Starter refuses to turn, the Starter is bad. If the engine slowly cranks with the jumper cable, the Battery is weak or bad or the Starter is dragging.

The click-clack noise you hear are the contacts inside the Solenoid. The Solenoid is the weakest connection between the Battery and the Starter. If either the Battery or the Starter is bad the Solenoid will make the sound. It does not mean the Solenoid is bad. The test I wrote about will verify if the Solenoid is bad when you bypass the Solenoid. You go on to testing the Battery and Starter with the methods I presented. It is really more simple to do than to write about.

Posted on Nov 12, 2010

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Either u got problem in ur ignition switch contactor(it is located aty the end of ur ignition key assembly) or the starter solenoid.

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If your car is simply not starting it could be something as simple as the neutral safety switch if you only hear a click turning the key. Disconnect under left side dash. White and has a green and black wire coming from button behind clutch pedal.

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please rate well

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Car wont start, makes a clicking sound under the hood


When you turn the ignition key to the start position you apply 12 volts to the solenoid. The solenoid is a relay switch that closes when you turn the key to the start position. When it closes It applies 12 volts to the starter motor.The starter motor draws a lot of electrical current, (so much so that they could not run that current thru the ignition switch, so they use the solenoid) What you hear clicking is the solenoid closing, or trying to close.I assume that "*****clicking" as you define it is a chatter rather then one click.

Possible causes: A low battery voltage. Has the battery been replaced in the last few
years few years. Try charging over night and see what happens
Bad connections on the battery terminals. Check for any white powder on and around the battery terminal. Use baking soda and water to clean the terminals (it'll fizz) then clean theem with a terminal brush. You can get one at any auto store
Bad connection on the starter solenoid
If it a manual shift, there is usually a kill switch somewhere on the shift mechanism
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In automatic shifter the kill switch is in the shift selector mechanism so you can't start the car unless you are in park.

Hope this helps Lood luck Loringh

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