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Old 11-18-2002, 01:50 PM
RROSIN1's Avatar
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Join Date: Sep 2002
Location: moses lake, washington
Posts: 122
glow plugs. do they work?

i have an 83' 300d. glow plug light on dash does not come on when i turn the key on. does this mean the glow plugs are not working? car runs fine once started. starts fine in the morning after being plugged in all night. hard starting in the evening after being in the exposed work parking lot all day. i noticed the glow plug light did not come on one day after work. got it started and drove home. turned it off and back on and dash indicator worked. next morning nothing. please help
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Old 11-18-2002, 03:00 PM
jbaj007's Avatar
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Join Date: Jun 2001
Location: Santa Monica, CA
Posts: 2,053
Since the car starts in a climate that requires a block heater, you've ruled out fuse and reed switch in relay. That "no light" indicates one or more glow plugs are kaput. You can test them from connector at glow plug relay (from connector female for each plug to ground). Should be <1 ohm. Might want to replace them all if it's been eons (if they're orig.)
The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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