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Several ways. Firstly make sure you are getting voltage to the glow plug. The easiest way is to connect a 12v lamp between the battery negative and the top of the glowplug. Turn the ignition on and the lamp should light. If lamp does not light the glow plug relay circuit has a problem. If lamp test OK remove it from the negative terminal and connect to the positive terminal of the battery. If lamp lights, glow plug OK. OR turn the ignition on for ten seconds and switch off again. feel the connector the top of the glow plug and it should be warm. OR disconnect wire and check with a meter between the glow plug contact and the engine block, the ohmic value should be less than 10.

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17y ago

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