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Old 03-20-2000, 10:55 PM
be459 be459 is offline
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Join Date: Jun 1999
Location: Los Angeles, Calif, USA
Posts: 521
The glow plug relay is more or less a diagnostic tool. In your car (81?? or newer)when the 80A fuse is bad, it turns the indicator off. Also, if there is one (or more) glow plug drawing different amount of electrical current than the #1 glow plug (I think the #1 plus is used as reference), the electronics in the relay box turns off the indicator light.

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