Harbor Freight Tools


90° In-Line Spark Checker

Check your ignition system with this ignition spark tester

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DORMAN 86579 at $15.49 Save 68%

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Product Overview

Use this ignition spark tester to check the condition of the ignition system at each cylinder. The spark tester connects between the spark plug and spark plug wire to troubleshoot dirty spark plug connections, defective points and bad cables or connections. Connects in seconds.

  • Troubleshoot dirty spark plug connections, defective points, bad cables or connections
  • Connects between spark plug and spark plug wire in seconds

Important Information

  • This item is subject to a 20% restocking fee


63593, 4445, 69023
Shipping Weight
0.20 lb.
Note: Specifications are approximate and subject to change


We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.