Bosch OTC 6589 Electronic Ignition Spark Tester, White, for HEI Systems
- Bosch OTC 6589 is an electronic ignition spark tester for diagnosing high energy ignition systems. The inline design connects between the plug wire and ground to display true spark performance, helping technicians quickly confirm ignition output on passenger vehicles, trucks, and small engines.
- Features:
- Inline HEI testing method provides a visible, reliable spark indication to verify ignition performance under load.
- Ground clip connection enables fast setup and repeatable checks without removing spark plugs from the cylinder head.
- Compact, durable housing in white improves visibility in the engine bay during diagnostics.
- Works on gasoline vehicles and power equipment equipped with high energy electronic ignition systems.
- Specifications:
- Manufacturer: Bosch
- Part Number: 6589
- Product Type / Function: Electronic ignition spark tester for HEI systems
- Color: White
- Drive / Connection Type: Inline connection to plug wire with grounded clip
- System Compatibility or Application: Checks for spark on gasoline engines in cars, trucks, and small engines with high energy electronic ignition
- Alternate Part Numbers / Cross References: OTC 6589
- The Electronic Ignition Spark Tester can also be referred to as ignition spark tester, HEI spark tester, inline ignition tester, automotive spark tester, and electronic ignition tester.
Bosch provides professional automotive service tools and diagnostic accessories used by technicians worldwide for accurate, safe inspection and repair of modern vehicle systems.
Q: How do I use this spark tester?
A: Disconnect the plug wire, attach the tester to the wire, clip the tester to a good engine ground, then crank or run the engine and observe the spark through the tester window.
Q: What systems is it designed for?
A: It is intended for high energy electronic ignition systems on gasoline vehicles and small engines.
Q: Why use this instead of grounding a spark plug?
A: The inline tester shows true ignition performance under operating conditions, helping reveal faults that a loose grounded plug may not show.
