How to Test a Distributor Cap with a Multimeter?

Test a Distributor Cap with a Multimeter

Troubleshooting distributor caps? Don’t worry. This guide will teach you how to test the distributor cap with a multimeter. You’ll be able to diagnose any problems in no time! Sometimes your car has problems while starting and misfiring. The main reason for this is the distribution cap, due to which this is happening.

If you are facing these problems in your car, then let us inform you today in this article; How can you test the distributor cap with a multimeter to let you know; What is the problem with your car?

Let’s talk:

How to test a distributor cap with a multimeter?

Following quick steps to test a bad distributor cap with the multimeter:

  1. Disconnected Negative Terminal
  2. Starts finding the distributor Cap
  3. Make marks on the cap and wire
  4. Removed Distributor Cap
  5. Clean Distributor Terminals
  6. Test bad distributor with a multimeter
  7. Replace distributor cap
  8. In the end, reconnect with the battery

Now follow the step-by-step guide to test the distributor cap with a multimeter by following the steps below.

  • The best way to test the distributor cap is to use a multimeter. If you want to test the distributor cap, you should first have a multimeter.
  • Connect the multimeter to the terminals while removing the distributor cap. You will see that you will see two terminals, so all you have to do is connect the multimeter to the positive and negative terminals.
  • Set the resistance in OHM to check the reading after connecting the terminals. Remember that the resistance should be in OHM when testing with a multimeter.
  • To test the distributor cap with a multimeter, you must set the resistance to 600 to 1400 ohms.
  • Consider during testing if the resistance of the multimeter you get is in the normal range, then it is not a cause of concern for you; that is, there is no problem in your distributor cap. If the resistance is higher or lower than the normal range, then there is a problem with your distributor cap.
  • If the resistance is not in the normal range, you must replace the ignitor so that it does not cause further problems.
  • If you see more distance between the wires of the distributor cap and the rotor, solve this problem because if you do not solve this problem, it will cause sparks.

What are the common distributor problems?What are the common distributor problems

When the distributor has a defect, the car starts to get rough and not start properly. The cars have problems when the distributor cap or rotor is broken or there is a problem.

When the distributor cap is damaged, the great sign is that sparks from the car are a danger to you.

The distributor has a problem: the vacuum advance unit is damaged, which causes the car to deteriorate and spark. The work of the vacuum advance unit is to improve engine performance.

If your car distributor does not work correctly, it can be significant anxiety and danger for you.

How do we know that our distributor has a defect?

It is elementary to find out that our distributor has a defect. Considering some symptoms presented below, you can find out whether your distributor has any defects or not. Let’s talk about these symptoms.

  • A fault-free car does not take long to run, whereas if a fault occurs in the distributor, the car does not start quickly. The car sparks and makes a rough sound when trying to start.
  • The car sparks due to distributor failure, which is an alarm bell for you. If your car is sparking, check your car engine for any fault causing it.
  • A faulty distributor does not allow the car’s engine to provide good power, due to which your car does not give you full power.
  • Stall or backfire in the car means that your car’s distributor cap is broken.
  • When there is a fault in the distributor of the car, the engine of the car makes a dull and unbearable sound.

Therefore, whenever these symptoms are seen in the car, a fault has occurred in your car. It’s time to replace your car’s distributor cap.

What is the resistance of the distributor cap?

Resistance is a factor that lets you know if there is a fault in your distributor cap or not. A regular and ideal distributor cap has zero or near zero resistance.

If the leakage of your distributor cap is not zero or close to zero, it means there is a fault in your distributor cap due to which it is not working correctly.

Is it necessary to disconnect the battery to replace the distributor cap?

Yes! Disassembling the battery is a better option for replacing the distributor cap. As you also know, electrical things can be harmful, so whenever you change the distributor cap, disconnect the battery first.

How can I tell if the engine is misfiring?

It is very easy to tell that the engine is misfiring. The following signs can help you tell that the engine is misfiring.

  • Loss of power
  • Face difficulty in starting the engine
  • Rises fuel consumption
  • Increase in emission
  • Arise of pooping sound
  • Manifold backfires
  • Vibration, jerks, and stalls of the engine


The purpose of this article was to give you an idea of how you can test the distributor cap using a multimeter. When your distributor cap doesn’t work correctly, don’t panic, but solve the problem by testing the method mentioned in the article.

As my goal was to inform you with this article on” how to test a distributor cap with a multimeter?”; I hope this article will be of interest to you.

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