PriceProtect™
DriveShield™
GarageGuard™
Services
Insurance
Car Insurance
Compare Car Insurance with Jerry
Jerry’s Expert Advice
Car Insurance Estimates
Home & Renters Insurance
Renters Insurance
Loans
Car Loan
Compare Car Loans with Jerry
Jerry's Expert Advice
Car Loan Guides
Repairs
Car Repair Estimates
Repair Estimates for Popular Services
Advice
Read Car Content
Browse Jerry Car Advice
Check Out Expert Car QnA
Learn About How We Create Content
Jerry Data & Research
How to test spark plug wires?
I think my spark plugs need to be replaced, but I want to check to make sure before buying a new set. Do you know how to test spark plug wires?
Lindsey Hoover · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Great question! It’s common for spark plugs to experience damage caused by engine heat, vibrations, or other engine parts’ abrasions. To test your spark plug wires for wear, you’ll need to have 12 Volt light test handy.
Once you have your 12 Volt light tester ready, simply follow the steps below to learn how to test spark plug wires:
- Attach the test light to an engine ground
- Turn your engine on
- Run the test light along each spark plug wire, looking for spark jumps
If you see a spark jump from your plug wire to the test light, it’s time you should replace your spark plug wires. Still unsure if you need to replace the wires? Not to worry! A
professional mechanic
can help you determine the next steps.In just 45 seconds, a licensed broker will provide you with quotes from over 55+ of the top insurance companies today. Once you choose the best policy for you, Jerry takes care of the rest!
The absolute best part? Jerry customers save on average $800+ per year on car insurance!
View full answer
- Gregory R.
WHY YOU CAN TRUST JERRY
Jerry partners with more than 50 insurance companies, but our content is independently researched, written, and fact-checked by our team of editors and agents. We aren’t paid for reviews or other content.
Join 4M+ members in lowering their car insurance
You Might Also Be Interested
Read Advice From Car Experts At Jerry
What Others Are Asking
Browse More Content
Insurance in Your State
Easiest way to compare and buy car insurance
No long forms
No spam or unwanted phone calls
Quotes from top insurance companies
