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Old 02-19-2006, 07:58 PM
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Join Date: Sep 2001
Location: Former New Jersey resident, transplanted to Atlanta
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1983 300SD W126 glow plugs inoperable

Just purchased a 1983 300SD.... Glow plug indicator dash lamp is inoperable during the preglow cycle (It does light up when initial dash lights come on)......I removed the 5 pin connector that goes to the glaow plaugs from the glow plug relay.....With connector removed relay sends voltage to all 5 pins when tjhe keyswitch is turned to the "run" position.......Based on this result, I assume that the relay is good........NEXT, with my meter on OHMS scale and the negative lead connected to the battery negative terminal I read each of the 5 glow plugs (at the connector) as follows:

Glow plug #1: 153.0 ohms
Glow Plug #2: OPEN
Glow Plug #3: 51.1 ohms
Glow Plug #4: OPEN
Glow Plug #5: OPEN

I also got the same exact readings directly at the glow plugs (bypassing the wires)

Based on these readings, are ALL of the glow plugs defective????

Thanks in advance for all replies!!!

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2006 E320 CDI
1999 E300 Turbo Diesl
2002 ML500
1995 E320 Station Wagon


MBs I've owned
1997 E320 Assassinated by Pine Tree
1987 300E Wife Killed Engine
1981 300D Stretch Limo Total Loss
1970 250 Coupe 212,000 mi.
1974 450sel 184,000 mi.
1974 240D 377,000 mi.
1977 300D 204, 000 mi.
1979 280se God Only Knows!
1983 240D 130,000 mi.
1972 220D 280,000 mi.
1983 300SD 244,000 mi.
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Old 02-19-2006, 09:03 PM
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Join Date: Sep 2001
Location: Lathrup Village, Michigan
Posts: 2,939
YES!

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Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
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