Quote:
Originally Posted by BillGrissom
I understand that the light goes out when the circuit estimates that you could try starting, based on the engine temperature.
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On an '84 300D, there is no engine temperature input to the preglow timer.
Quote:
Originally Posted by BillGrissom
While under the hood, pull the glow plug connector and measure the resistance of each of the 5 pins to ground. Should be real low <10 ohm.
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Should be
way less than 10 Ohms. A new glow plug is typically around 0.7 Ohm.