Quote:
Originally Posted by tangofox007
Why would it matter which two plugs failed?
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Because the glow plug light being on is controlled in part by a circuit that compares the current draw on a few of the glow plug pins in the relay.
Certain combinations can still light the lamp, while others won't.
If I remember what I read a while back, cylinder 1 is compared to the rest, but I don't know the actual ins and outs beyond that.