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#1
08-05-2009, 10:10 AM
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Bad Glow Plug Relay- pics of old unit after removal
here's a couple of pics from my 124 E300D relay that was intermittently working (now replaced with a new unit) just wondering what could've caused the melting of the plastic? Just old age/component failure? The circuit board looks ok at the back, though there's some black marks on the front as you might be able to make out in the pics (probably from the plastic)...
 
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1993 320TE M104 --------------------------------------------------- past: 1983 230E W123 M102 1994 E300D S124 OM606 (x2) 1967 250SE W108 M129 1972 280se 3.5 W108 M116 1980 280SE W116 M110 1980 350SE W116 M116 1992 300E W124 M103 1994 E280 W124 M104 ---------------------------------------------- "music and women I cannot but give way to, whatever my business" -Pepys Last edited by chazola; 08-05-2009 at 10:16 AM. 
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#2
08-05-2009, 11:51 AM
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Nice picture. I guess there is a lot of Amps flowing there. So after many years and burning of the contacts the resistance just built up to a point where a lot of heat was being generated.
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1993 W124 300D 2.5L Turbo, OM602.962 2000 Chevrolet Cavalier, 2.4L DOHC 2002 Ford Explorer, 4.0L SOHC 2005 Toyota Prius, 1.5L http://www.fuelly.com/sig-us/40601.png
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#3
08-05-2009, 11:52 AM
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On second thought, does the relay top come off easily? I wonder if cleaning the contacts should be a maintenance item?
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1993 W124 300D 2.5L Turbo, OM602.962 2000 Chevrolet Cavalier, 2.4L DOHC 2002 Ford Explorer, 4.0L SOHC 2005 Toyota Prius, 1.5L http://www.fuelly.com/sig-us/40601.png Last edited by Oldwolf; 08-05-2009 at 06:05 PM.
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#4
08-05-2009, 04:15 PM
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yea, it comes off easily- just 4 screws and then it slides off. I suspect this was the original relay so it did pretty well for 193k...
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1993 320TE M104 --------------------------------------------------- past: 1983 230E W123 M102 1994 E300D S124 OM606 (x2) 1967 250SE W108 M129 1972 280se 3.5 W108 M116 1980 280SE W116 M110 1980 350SE W116 M116 1992 300E W124 M103 1994 E280 W124 M104 ---------------------------------------------- "music and women I cannot but give way to, whatever my business" -Pepys
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