Brian,

Assuming (there I go using that word again ) you didn't want me try this test with the engine running, I turned the ignition key, the glow plug light came on, and then about 5 seconds later, when it went out, I noted the time. The three times I did this test, I heard a distinct solenoid relay "clunking" sound after 27, 28, and 27 seconds respectively. Could this have been the afterglow relay turning off? If so, it sounds like that portion of the relay is functioning properly.

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