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No power to the ignition coil in a Dodge Ram 1500 can make you frustrated when you are in a hurry. If you want a prompt diagnosis and long-term solutions, you might prefer expert assistance. But can you solve it on your own? 

The most common causes of no power to an ignition coil are a faulty ignition switch, a broken or corroded connector to the coil, or a failed power relay. Other possible causes could include a blown fuse, a dead battery, or electrical system issues. 

Although it is not easy to diagnose ignition coil issues, there are some straightforward diagnostics you can perform on your own.

Signs of a Faulty Ignition Coil Dodge Ram 1500

If your Dodge Ram 1500 has a faulty ignition coil, you may experience the following common symptoms.

  • Engine misfiring is a common sign of a faulty ignition coil. You may face this when accelerating your vehicle.
  • The issue is starting the vehicle.
  • Rough idling can also be a symptom of problems in the ignition coil.
  • Fuel consumption may also be affected; your vehicle may consume more fuel than usual.
  • The check engine light displayed an error message for a bad ignition coil.

It may also help you learn more about ignition switch issues: Dodge Ram ignition switch problems

Causes of No Power to Ignition Coil 

Here is the list of five major problems that may cause no power to your ignition coil.

  • Faulty Ignition Switch
  • Broken or corroded coil connectors
  • Failed Power Relay
  • Blown fuse 
  • Bad Battery

For more reasons for ignition switch issues, also read this blog: Mazda 3 Ignition Switch Problem.

No Power to Ignition Coil Dodge Ram 1500 [Problems and Solutions]

no power to ignition coil dodge ram 1500
Auto mechanic checking ignition coils

Problem 1: Faulty Ignition Switch

The ignition switch ensures power to the ignition coil, creating sparks for combustion. If the ignition switch fails, your ignition coil will fail to create the spark to start the engine.


  • Remove the bolts holding the ignition switch.
  • Remove the ignition switch and disconnect the connector located behind the ignition switch.
  • Now, connect the connector to the new ignition switch. I recommend Dorman 601-086 Ignition Starter Switch for your Dodge Ram 1500.
  • Now start the engine and ensure the coil is working fine.

Problem 2: Broken or Corroded Coil Connectors

Broken ignition coil Connectors
ignition coil connector clip broken

Coil connectors are responsible for the power supply; if there is corrosion or they are broken, it may make the ignition coil problematic. They could not get the required power, which may prevent it from functioning correctly. It needs to be checked and fixed to fix the issue.


  • First, switch the engine off and disconnect the battery.
  • Remove the ignition switch bolts, and then take out the ignition switch.
  • Now, check for the ignition coil connectors on the back of the switch.
  • First, check the connectors for corrosion. If there is corrosion, remove it using a wire brush or cleaner.
  • But if the ignition connectors are broken, remove the damaged connectors and replace them with new ones. 
  • Put back the ignition coil, then the ignition switch, and secure it with bolts. 
  • Now turn the engine on and ensure the problem has been removed.

It may also help you: Volkswagen Jetta Ignition Switch Problems

Problem 3: Failed Power Relay

The power relay delivers the proper power to the ignition coil, generating a spark. But if the power relay becomes faulty, it will fail to supply the required power to the ignition coil. The ignition coil will fail to create a spark to ignite the spark plugs.


  • Open your car’s hood and locate the fuse box. 
  • Read the instructions on the fuse box about the location of the power relay.
  • Now open the fuse box and look for the power relay.
  • Remove the power relay and inspect it. If it is bad replace it with a compatible one.
  • After the power relay replacement, close the fuse box.
  • Now turn on the ignition key and check the engine; ensure ignition coil is working okay.

If your Chrysler 300 ignition switch has issues read this article: Chrysler 300 ignition switch problems

Problem 4: Blown Fuse 

A blown fuse on your Dodge Ram 1500 can be the culprit for the bad ignition coil. If the fuse is blown, it can disrupt the power supply and prevent it from generating the spark for combustion. It can also fail your ignition coil; immediately fix the issue to ensure the proper functioning of the ignition coil.


  • The fuse for the ignition coil is also located in the fuse box; inspect the fuse box and locate it.
  • Once located, remove and inspect it for damage.
  • Replace the blown or damaged fuse.
  • After replacement, close the fuse box and then the car’s hood.
  • Turn the ignition key and make sure the issue is resolved.

Problem 5: Bad Battery

The battery’s performance is directly related to all electrical equipment in your vehicle. If the battery has low power or is dead, it will fail to provide power to the ignition coil. Ultimately, your ignition coil will fail to create the spark. You must check for the battery power and ensure it is okay.


  • Open your car’s hood and locate the battery.
  • Remove its terminals, first negative and then positive.
  • Take a digital multimeter and connect it to the battery. I recommend Neiko HILTEX 40508 Digital Multimeter for accuracy.
  • Verify that the multimeter readings are 12.4 V by checking them.
  • If the voltage is low, you have low charging or a dead battery.
  • Connect it to a power source and recharge it for at least half an hour.
  • Now recheck the voltage; if it is still low, replace the battery.
  • After replacement, switch on the engine and confirm the issue has been removed.

Fix your Chevy Silverado ignition switch issues by following the instructions here: 2008 Chevy Silverado Ignition Switch Problems.

How to Test the Ignition Coil Dodge Ram 1500?

Follow the steps below to test the ignition coil on your Dodge Ram 1500.

  • Turn off the ignition switch and remove it after removing its bolts.
  • Then remove its ignition coil.
  • Take a multimeter and connect it to the ignition coil. Make sure you are connecting them correctly. 
  • Once connected, check the ignition coil readings on the multimeter and compare them to the recommended readings. 
  • If you see the readings are not matching, you have an issue with the ignition coil. It will need replacement.

How to Replace Ignition Coil on Dodge Ram 1500?

Follow the steps below when replacing the ignition coil on your Dodge Ram 1500.

  • First, remove the ignition switch; there will be bolts securing the ignition switch.
  • After that, check for the ignition coil on the back of the ignition switch.
  • Once you confirm, it needs replacement.
  • Now, disconnect the ignition coil connectors.
  • Gently pull it out; once pulled out, install the new one in its place.
  • Reconnect the connectors to the new ignition coil.
  • Also, mount the ignition switch and ensure your ignition coil works fine.

When to Seek Professional Help

Look for all possible solutions provided above; if you are still failing to fix the issue, call professional help. Professional mechanics know a better way to fix such issues quickly and permanently.

Frequently Asked Questions (FAQs):

How many ignition coils does a 5.7 hemi have?

The 5.7 hemi has 8 ignition coils for creating a spark to ignite the engine. However, there may be different numbers depending on new models. It is better to look in the manual for the exact number of coils.

Will a bad coil cause no spark?

Yes, the bad ignition coil may not create the spark or generate a weak spark that cannot provide enough spark to the engine. A bad ignition coil needs immediate fixation or replacement to ensure proper functioning.

How much power does an ignition coil need?

The make and model of the car determine this. But on average, a coil uses 2A or 24W continuously to perform its functions properly. You should ensure proper power for consistent performance.

Does a coil have power on both sides?

Yes, but it must measure the voltage on both sides of the coil if the points are open. If No power is passing through the coil, the potential will be the same on both sides.


You can perform poorly in your Dodge Ram 1500 with a bad ignition coil. You might frequently need help starting or misfiring when you accelerate. For better performance, it needs quick fixation. It is easy for you to fix if you diagnose the exact cause. You can try the above instructions to fix yourself. But if you continue to fail, then ask for professional help to fix the issue permanently.

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