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I assume you have something like a V12 with two banks of 6 cylinders each fed with a separate coil. I suggest you pull the lead off one of the plugs (with the engine off, naturally) and push a big nail inside the plug lead. Hold the end of the lead between two pieces of wood to insulate it and start her up. Point the nail as close to the spark plug as you can without touching it (or to any clean point on the engine block, like a bolt head you have sanded shiny) and see if you get a rhythmic spark (or any spark at all). No spark = no electicity. It doesn't actually prove the COIL is faulty because it might be that the coil is not getting any electricity supplied to it, but it's a start.
Wiki User
∙ 17y ago
Wiki User
∙ 7y agoThe best way to find out if an electrical coil is faulty is to do a continuity test on it. For this action you will need a multi-meter set to the resistance (ohms) position. Connect the meter across the coil leads and the resistance of the coil should be read on the meters scale. If there is no reading it means that the coil is open and can not be energized.
Sometimes a coil will not go open but short a few windings within the coil itself. This will make the coil draw a higher current than it should and become hotter than normal. Eventually this additional heat will burn the coil open. The only way to trouble shoot this condition is to have a replacement coil of the same size to compare the resistance to.
Take a reading on the new coil and compare it to the old coil. The coil resistances should be relatively close. If the old coil has a bit lower resistive reading than the new one, say 5 percent, then the old coil is faulty.
Wiki User
∙ 6y agoBy measuring the continuity of the circuit.
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What is the function of an electrical coil in a basic circuit?
There are a couple of examples that come to mind where there is a coil in a circuit. One is, the coil is used as a choke to block harmonics from going down the electrical line. Another example of a coil in the line is the coil in a magnetic contactor. When this coil is energized the contacts of the magnetic contactor close.
What is a voice coil?
a voice coil is the electromagnet that causes a speaker horn to move in response to the electrical impulses received from the amplifier.
How do you use a multimeter tester on dryer coils?
Generally, dryer coils either work or they don't. A multimeter can help you determine if a dryer coil is "burned out". If the coil has "continuity", it's probably fine. Generally, if there is a hot spot in the coil it will burn out rapidly.
How does a speaker and a microphone work in opposite ways?
A microphone converts sound into electrical impulses. A speaker converts electrical impulses into sound. Because they both work on the same principle, a changing electrical field (the audio signal) in a coil causes a magnet within the coil to vibrate in tandem. The magnet is attached usually to a paper cone which allow our ears to hear the sound. The converse is also true. For example if you talk into a headphone it causes the magnet to vibrate which produces an electrical signal in the coil which is connected to the headphone cable. Ram did this : ok micro phones convert mechanical energy which is te air from your mouth to mechanical ugh ohhhhhhh cccrapp 8=======D---
What is made by passing an electric current through coils of wire?
An electro magnet is created when a current is passed through a coil of wire. This effect is the main operation of how an electrical solenoid operates.
How do you determine if the ignition coil is faulty?
Swap it with a known good coil. Give us the year, make, model and engine info for more info.
No fire on 1969 350 engine with hei and accel super coil just replaced with new coil still no fire possible faulty distributer?
On a high energy ignition, possible problems include: Faulty keyswitch, faulty wiring or connectors, faulty pickup inside the distributor, faulty electrical condenser, if it has points (depends on the type of HEI) the points could be bad, faulty coil or faulty HEI control module. You will need to identify which component has failed.
Why does the Ford ranger idles high then dies?
Loose or faulty electrical connection at distributor,coil or alternatorFault in the fuel or electrical systemsNot enough fuel reching carburetorVacuum leak at the gasket surface of manifold or carburetor
Would the ignition coil in a 1997 cavalier be the reason the car is so noisy?
Only if a faulty coil is causing a misfire. A faulty coil can be diagnosed easily by connecting an oscilloscope and looking at the waveforms.
What is the best way to deal with faulty electrical equipment?
The best way to deal with faulty electrical equipment is to have it repaired or replace it.
How do you change a bad coil on a 2003 Ford Expedition?
Remove engine cover, determine which coil is bad or better yet replace them all. Remove the electrical connection from ignition coil, remove 7/32 bolt from coil (be careful not to drop),pull coil from top of sparkplug and remove.
What makes coil pack not fire on 2 sides of it?
It is faulty
Why would dodge ram 1500truck 1999 lack power?
# Fault in the fuel or electrical system # Faulty or incorrectly gapped spark plugs # Faulty coil # Brakes binding # Automatic transmission fluid incorrect # Clutch slipping # Fuel filter clogged and/or impurities in tank
What sort of electrical engine problem does a 92 corolla Gli with 4AFE engine has if its engine suddenly stall?
you probably have a faulty ignition coil, especialy if engine generaly denies to start from time to time...
What could cause your 1994 Honda Prelude to not get spark from the coil?
Either the coil is bad or the ignition control module is bad.I would think the coil is faulty.
Why do you get no spark from the engine coil?
Check to see if your getting 9.5 volts to the coil hot wire if so, the coil is faulty due to broken windings internally.
Is the phrase faulty electrical wiring correct?
Yes.
