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#1
01-09-2007, 11:36 PM
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Glow Plug Relay:Schematic Wanted
I have a Glow Plug Relay that need repair but I don't have a squematic to track and test all components on the printed board.
I will be really glad if someone that has it can send me a copy via internet. If not possible via internet, please let me know to give my fax number. Thanks Nyck
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Nyck - TX - USA 
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#2
01-09-2007, 11:44 PM
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Glow Plug Relay - Squematic Wanted.
I have a Glow Plug Relay for a Mercedes Bens 1984-300SD in need of repair.
The problem is that I don't have the squematic to track and test all components on the printed board. It will be great if someone that has it can send me a copy through the internet or by fax.If not possible by internet, please let me know to give the fax number. Thanks Nyck
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Nyck - TX - USA
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#3
01-10-2007, 01:25 AM
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Glow plug Schematic
That is a problem...I have a couple of good ones that I repaired by resoldering the large pads on the PCB...
The closest diagram I can find is a partial one in the Haynes 123 diesel manual....not much of a drawing but some info....very basic...no component ID's.... What is yours doing wrong...? Are you sure it is the problem...?
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1978 Yellow 300D (The Mustard Toad) 1980 Blue 240D (The Iron Toad) 1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad) (Open the pod bay doors HAL)
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#4
01-10-2007, 09:34 AM
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Its a simple circuit. Why can't you trace the tracks and circuitry and draw it on a piece of paper?
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#5
01-10-2007, 12:56 PM
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Thank you for your reply.
My glow plug relay wasn't going on when turning ignition key to pre-glow position. I swap the one from my MB 300SD 1982 and it works OK. I opened the one that wasn't working and after a good check up on it I found one broken leg of the relay coil at the soldering point on PCB. After repair soldering I try again and it works fine. Only one difference that I felt was that after the relay turn off (30 seconds), if turn the key off and on again before two minutes, the relay will not click. After two or three minutes it will work normally. The relay of my 1982 does not work the same way. Is this symptom correct? Thanks. Nyck
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Nyck - TX - USA
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#6
01-10-2007, 10:02 PM
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Relay
Are the relays the same part numbers on the outside case of the cover...?
__________________
1978 Yellow 300D (The Mustard Toad) 1980 Blue 240D (The Iron Toad) 1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad) (Open the pod bay doors HAL)
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#7
01-10-2007, 11:17 PM
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Quote:
__________________
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) 2005 Tzitzu (Griffon) 2009 Welsh Corgi (Buba) 
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#8
01-11-2007, 03:16 AM
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Glow Plug Relay
Your last post said you repaired the solder joint and that the relay works fine now...30 seconds of glow time should be more than enough.....
It is best to test the relay output with a voltmeter ..... The pre-glow lamp can be misleading....It is possible for it to be off with voltage still being supplied to the glow plugs.... Sounds like you repaired the problem ok.... A lot of my relays had bad solder joints.....easy to fix....
__________________
1978 Yellow 300D (The Mustard Toad) 1980 Blue 240D (The Iron Toad) 1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad) (Open the pod bay doors HAL)
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