Quote:
Originally Posted by fruitcakesa
If the glow plug light comes on normally does that necessarily indicate that all the glow plugs are working? Or can it light even with a bad plug?
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The light is controlled by a relay which measures the balance of the current to the #1 glow plug versus the combined current to the remaining plugs. Except for the #1 plug, it is
possible that one failed plug will not be detected. According to the FSM, the failure of the #1 plug or any
two other plugs is guaranteed to provide a proper light indication.