[diesel_mercedes] Glow Plug Testing ~ the EASY Way

 



Or , as it's cold and maybe you like tools to play with , just buy a $19.95 Infra Red Thermometer from Harbor Freight Co. and shoot each glow plug when they're warm , either they'll all be the same temp. (good) or one or more will be cooler (bad and needing replacement)

-Nate
Lawrence Rhodes Wrote :

You must test each glow plug. I measured a used but good plug and it registered .9 ohm. Take off the relay cover & pull the connector out to test or disconnect each one at the plug. Test with a multimeter. If the relay is connected you won't get a good test. All the glow plugs must be good to get the motor to start well. Lawrence Rhodes......

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