Thanks for the info.
I thought at first that the bulb was burned out but it maybe just a bad glow plug. I have a friend with a 85 wagon and he has the same syptoms but his light stays on it might just be an 85 thing but I don't think it will hurt to change them anyway.

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Moss Gate Bed & Breakfast
1985 300 TD GG done in by a red light runner
1984 300 CD Sold
2008 Titian
2000 Cadillac SLS
1966 FLH Sold
2003 Harley Ultra