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  #1  
Old 02-04-2011, 04:12 PM
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'82 300td glowplug relay

Baby its cold outside and Adolph my daily drive does not want to cooperate, and hasn't since Monday night when the temperature went to low 20's.
In my readings on the forum I have determined my glowplugs maynot be working. I have cycled the glowplugs several times as many as 6 times and still no start.
I cycled the gp's and touched them no heat. In my readings I have decided that it maybe the relay mounted on the drivers side wheel well.

My question is, will the Glow Plug relay on a 1980 240D work on a 1982 300TD?


Thanks in advance
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  #2  
Old 02-04-2011, 04:32 PM
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You'll need one for a 5 cylinder.
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  #3  
Old 02-04-2011, 04:35 PM
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First make sure the strip fuse in the relay on the fender well is good. Look for cracks or breaks in the fuse. Then I'd check the voltage across the fuse to make sure you're getting voltage.
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  #4  
Old 02-04-2011, 05:30 PM
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I'd check for voltage at the plugs and the resistance of each plug before condemning the relay. x2 on the fuse.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #5  
Old 02-04-2011, 06:07 PM
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x4

On the above -- my strip fuse had a hairline break, easy & much cheaper fix than the whole relay.

While waiting for the weather to offer me an opportunity to fix the car I plugged in the block heater and had no problems starting it....course I could only be away from my extension cord and park the car for about 3 hours in todays 10 degree weather, otherwise the engine would cool down too much.
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  #6  
Old 02-04-2011, 07:51 PM
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Quote:
Originally Posted by kerry View Post
I'd check for voltage at the plugs and the resistance ofd each plug before condemning the relay. x2 on the fuse.
What should the restance read?
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'80 240D Kanarienvogel
77 240D 'AVA' is in heaven now
'82 300TD 343k was my daily driver 'ADOLPH' In Surgery for a severe Deer Bite to the Nose
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  #7  
Old 02-04-2011, 08:30 PM
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Less than 1 ohm on each plug. You do have pencil style plugs correct?
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #8  
Old 02-04-2011, 08:44 PM
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Quote:
Originally Posted by kerry View Post
Less than 1 ohm on each plug. You do have pencil style plugs correct?
Not sure, this will sound stupid but how can I tell?
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Collector of Fine Hose Clamps
'80 240D Kanarienvogel
77 240D 'AVA' is in heaven now
'82 300TD 343k was my daily driver 'ADOLPH' In Surgery for a severe Deer Bite to the Nose
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  #9  
Old 02-04-2011, 09:00 PM
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If there is a single wire going to each plug they are pencil.(parallel) If there are heavy sqiggly wires joining all the plugs together, they are loop plugs (in a series)
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #10  
Old 02-04-2011, 09:15 PM
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Quote:
Originally Posted by kerry View Post
If there is a single wire going to each plug they are pencil.(parallel) If there are heavy sqiggly wires joining all the plugs together, they are loop plugs (in a series)
they are the Pencil type
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Collector of Fine Hose Clamps
'80 240D Kanarienvogel
77 240D 'AVA' is in heaven now
'82 300TD 343k was my daily driver 'ADOLPH' In Surgery for a severe Deer Bite to the Nose
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  #11  
Old 02-04-2011, 09:35 PM
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disconnect the harness at the relay and put one probe on the end of the glow plug and another on the block to read ohms. You could also test them at the harness at the relay but there you're also testing the harness itself.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #12  
Old 02-05-2011, 12:32 AM
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Go to the Diesel Giant web site and there is a pictorial on how to check the Glow Plugs.
(This is not a recommend to buy parts there.)
When the page opens you will need to scroll down the page to see the pics.
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