ENGINE TROUBLESHOOTING · PRODUCT SPOTLIGHT
5 Reasons to Check the Ignition Signal Before Replacing Parts
An engine that will not start leaves you with questions. Before guessing at replacement parts, a visible ignition check can help you decide where to look next.
The Universal Ignition Circuit Checker connects inline at a compatible spark-plug lead. Its flashing indicator brings ignition activity into view, with no separate battery or screen to set up.
1. See Ignition Activity Instead of Guessing
When an engine will not start or runs unevenly, checking ignition activity is a useful place to begin. The clear housing lets you see the indicator flash as ignition pulses pass through the tester.
That visible signal gives you information to guide the next diagnostic step before you start replacing parts.
2. Check the Circuit with an Inline Connection
The tester fits between a compatible spark-plug lead and the spark plug. Its metal connector and rubber socket create a connection point for a visual ignition check.
You can observe the indicator with the spark plug still installed, rather than removing the plug simply to begin a visual check.
3. Keep a Tool Ready Without Charging It
There are no separate batteries to recharge and no app to pair. This passive tester uses the ignition pulses in the circuit to light its indicator.
Keep it with your hand tools for a straightforward visual check whenever you are troubleshooting a compatible ignition system.
4. Reach the Connection with a Flexible Lead
The flexible cable lets the indicator sit apart from the plug connection, helping you position the tool where the housing can be seen.
The compact body combines a clear plastic housing, metal connector and rubber boot. It takes little room in a tool kit.
5. Choose a Pack for Your Tool Kit
Choose one tester for your own kit or a two-pack for separate toolboxes or work areas. Both options use the same inline indicator design.
The indicator bulb is replaceable, with a housing that can be opened to access it.
Match the Connection to Your Engine
For gasoline engines with compatible spark-plug lead connections, including suitable cars, motorcycles and small engines such as lawn mowers.
Connect and disconnect with the engine off. Follow the engine and tester instructions, keep clear of moving parts, and do not touch ignition connections during testing.
Know What You Are Checking
What does the flashing indicator show?
It gives a visual indication of ignition pulses passing through the test connection. Use that result as one part of diagnosing the ignition system.
Does it need batteries?
No. It is a passive inline tester powered by the ignition pulses during testing.
Can I replace the bulb?
Yes. The housing can be opened to access the replaceable internal indicator bulb.
Which packs are available?
Choose a 1 Pack or 2 Pack on the product page.
SEE THE SIGNAL. NARROW THE SEARCH.
50% OFF
Universal Ignition Circuit Checker
- Visible flashing ignition indicator
- Inline spark-plug lead connection
- No separate batteries required
- Single and double packs available
For compatible gasoline-engine ignition connections.
Start with a Signal You Can See.
Add a compact inline tester to your tools for compatible gasoline-engine ignition systems.
Get 50% OFF the Universal Ignition Circuit Checker.