A self-calibrating, easy to use glow plug tester, suitable for both steel and ceramic glow plugs. Enables fast in-situ diagnosis of glow plug failure on 12V and 24V DC diesel engines. Fitted with both audible indicators and a LED visual display. These indicators provide easy to interpret and precise data every time. The built-in reverse polarity protection delivers safe usage for both the professional vehicle technician and the keen DIYer.
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