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jimboon Posted on May 23, 2016
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What is the hot side of the coil so I can hot wire to see if I can get spark also to check to see if coil still is goood

1 Answer

Pcm2048

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  • Cars & Trucks Master 754 Answers
  • Posted on May 23, 2016
Pcm2048
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The wire that goes to the distributor is the ground side of the coil. The other side is the positive side. Be careful if you plan to connect 12 volts to this terminal on the car, as most cars have a ballast resistor between the 12 volts and the positive of the coil. If you connect 12 volts directly to the coil you may burn out the coil. You are better to use a multimeter to check the coil as that will not damage it.

4 Related Answers

Anonymous

  • 1 Answer
  • Posted on Dec 22, 2008

SOURCE: vihicle died won't start

My 92 Subaru would not start. New rotor, cap, replaced fuel filter. No gas getting to filter. When gas trickled in carb, runs like a top. I think the fuel pump out.

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Terry Reimink

  • 458 Answers
  • Posted on Jun 30, 2011

SOURCE: I have a 1954 Mercury

Ignition points can corrode over long periods of inactivity preventing them from making contact. If the contact surfaces are flat you can take a folded dollar bill and slide it back and forth between the closed contacts several times to clean them up or you can just replace the points. Try that first then see if you have spark.

czaa

Arnie Burke

  • 7339 Answers
  • Posted on Nov 01, 2011

SOURCE: coil will not fire

dont replace parts till u kno the answer--start simple 1st like worn distributer cap or bad wire boot------or ignition module-------maybe a fuse or flawed wire-------try to get it scanned by a mobile mech

jeff5may32

  • 1258 Answers
  • Posted on Feb 23, 2015

SOURCE: No spark coming from the new coil.

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Related Questions:

2helpful
2answers

Why there is no spark from the coil wire when cranking why?

I have no wiring info for your model year. With key on both positive and negative at the coil, are hot, correct?
Do you have tfi module on this vehicle?
0helpful
1answer

95 1500V 6 get gas a spark but don't. Strart new cap wire. Coil I don't what to do now some body help me

Is this a GM vehicle? Which one, what is engine litre size?
How long since a tune-up? If no spark check plugs and plug wires--check cap and rotor. If it has a coil wire to distributor take it loose from distributor, hold close to engine ground, have helper crank while you watch for spark, if no spark, could coil wire or coil, Check primary voltage coil, usually goes hot with key on. The coil also needs a ground usually controlled by ignition module.
0helpful
2answers

I have a 1990 Dodge Ram 150 with the 318 engine that the coil isnt sending fire to the dist...But the coil is good. Could someone help?

Could be a bad coil, or a bad pickup coil inside the distributor, or worst case a bad pcm.

You said the coil is good, but didn't mention if you had tested the coil's primary and secondary circuits with an ohmmeter to see if they are within specs? And the pickup coil is like a crank position sensor: it tells the pcm crankshaft position and rpm so the computer can determine spark timing.
0helpful
1answer

My 98 for explorer runs bad after I changed the spark plugs an wires and fuel filter and coil what now

You'll need to double check each item you replaced one by one to find the cause. I recommend (In the future) to replace wires, start & check engine. Replace fuel filter, start & check, coil then star & check.
For wires, make sure you have wires going to correct locations, check for possible damage to spark plugs (Cracks or breaks), and good connections.
Fuel filter, make sure it's in proper orientation as to flow direction as seen on the arrow stamped on the side, showing flow direction. and make sure you are not leaking fuel anywhere.
Coil... Again, check connections and proper wiring.
You might also wish to check for proper "Hot" (Bright Blueish spark) at the plugs.. Wear heavy insulated gloves or use well insulated grips to hold plugs against engine block to view spark.
A dimer orange spark = bad connection or faulty wire.
Also if you have a manual, they usually have detailed troubleshoot guides.
Best of luck on a speedy diagnosis!
0helpful
1answer

96 nissan altima gxe runs good until it gets hot then stalls

I've been there.... A nightmare!!!

Your prolem sounds as the classical Hot Coil problem with no solution. Next time when engine stalls, check for spark, touch the coil and the ignition module. If they feel hot to the touch (can't hold it), chances are there is too much resistance in the High Tension side of the ignintion circuit.
This means the circuit from the coil to the spark plugs has too much resistance. Since you already changed everything I have to ask a question: Is everything as original specs??

When I had this problem it resulted that the gap between the terminals of the distributor cap (new) and rotor where to big, This created great resistance which heated the coil and quit sending spark.

Perhaps there is something in the High Tension circuit which is out of original specs. Is the gap in spark plugs correct?
Try an old distibutor cap. Do the metal contacts in the spark plug cables touch the metal of the spark plug contact?
Does the metal contact from the cable touch the metal from the coil's contact? Are they dry?

Check things which can create a gap where electriciy has to "jump" to complete its way to the spark plug. These are the ones which cause the hot coil and hot module trouble.
1helpful
1answer

When the motor gets hot the car cuts and will not start for awhile.ran water over the distributor and the car started up.what caused that?

The most likely cause is you have a bad distributor. The coil is inside the distributor and when it gets hot, it quits creating spark. The testing to verify this is a little complicated and takes a little know how.
To test the coil in the distributor first disconnect the Automatic Shut Down (ASD) relay (located on the drivers side on the firewall in a group of three relays, it is the middle one) and the Powertrain Control Module (PCM) (on the drivers side in the front of engine compartment to the right of the air filter housing) connectors.

Next, remove the distributor cap and connect a grounded jumper wire near the coil tower. This is to check for spark jumping from the coil.

Jumper pin 30 to pin 87 at the ASD relay.

Check for 12 volts to the Dark Green/Orange wire at the single wire connector at the distributor. This wire feeds the positive side of the coil.

5. Connect a 12v test light to B+. With the probe end of the test light, momentarily tap the Black/Gray wire at pin 11of the PCM. This action should cause the coil to fire. If there is no spark out of the coil tower during this step, the distributor has failed and needs to be replaced. If there is spark from the coil tower check all powers and grounds at the PCM.
Hope this helps. Good luck!!
1helpful
3answers

Car starts and runs good untill the motor warms up.once the motor gets hot,the car cuts off and will not start.ran water over the distributor and the car started.what caused that?

The most likely cause is you have a bad distributor. The coil is inside the distributor and when it gets hot, it quits creating spark. The testing to verify this is a little complicated and takes a little know how.
To test the coil in the distributor first disconnect the Automatic Shut Down (ASD) relay (located on the drivers side on the firewall in a group of three relays, it is the middle one) and the Powertrain Control Module (PCM) (on the drivers side in the front of engine compartment to the right of the air filter housing) connectors.

Next, remove the distributor cap and connect a grounded jumper wire near the coil tower. This is to check for spark jumping from the coil.

Jumper pin 30 to pin 87 at the ASD relay.

Check for 12 volts to the Dark Green/Orange wire at the single wire connector at the distributor. This wire feeds the positive side of the coil.

5. Connect a 12v test light to B+. With the probe end of the test light, momentarily tap the Black/Gray wire at pin 11of the PCM. This action should cause the coil to fire. If there is no spark out of the coil tower during this step, the distributor has failed and needs to be replaced. If there is spark from the coil tower check all powers and grounds at the PCM.
Hope this helps. Good luck!!
0helpful
1answer

No start on old gasoline forklift engine.

most likely the ign switch is ok if you are getting spark. so you have a hot spark at coil and weak fire at plugs? if you have a test light check the positive side of coil for power when turning key on and cranking. if it is dropping power on positive side then ign switch could be bad. can "hotwire" coil by jumping a wire to positive side of coil to pos of battery this will eliminate ign switch.
0helpful
2answers

Getting 12V on the ground wire to the coil. Any

the coil has two wires. one side is hot 12 volts the other side is the side that is pulsed to ground to create the magnetic field to induce high voltage.. with the key on not running you should see voltage on both wires... disconnect the plug from coil and recheck you will have power only on one wire that is the hot wire.. hook back the plug now take your test light ground clip and clip it to the positive terminal on battery. then back probe the wire to be pulsed.. have some one crank jeep and you look at test light.. looking for kinda dimm flash... if so that tell you you should have spark if not the bad coil.. if you don't see flash then probable bad pick up/... let me know
0helpful
1answer

No ignition to spark plugs

The coil has two seperate circuits 1) primary (is this where you are checking?) the thin wires at the base of the coil. and a secondary circuit this is your high voltage side the spark side and it needs the primary side to turn on and off in order to work youe test light should flash on the negative side on the primary circuit if it does not you will not have spark and your triggering device is deffective if it does flash then you have an open coil and it should be replaced.
Hope this helps you
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