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#1
10-20-2003, 08:26 PM
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1980 glow plugs 300D
My glow plugs are not working I check the glow plug they check out good this a parallel system I put a used relay on it but sill not working there power to the relay but none from pin to the glow plugs were do I go from here?
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#2
10-20-2003, 11:31 PM
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Hi gatliffe, have you checked your glow plugs for continuity ? If the #1 gp is bad it may affect them all. Check the ground also , it's on the passenger side near the headlight. Check the pin and socket condition where it plugs into the relay , corrosion at any of these may affect the gp's. Good luck and welcome to the board.
__________________
Democracy dies in darkness, you have to kick at the darkness till it bleeds daylight
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#3
10-20-2003, 11:40 PM
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gatliffe,
There is a fuse in the GP relay. Check that, it could have a hair line crack. Also, listen to the GP relay when key is turned to the run position. The relay should click. If it doesn't click, either there is no electricticity getting to the relay or the relay is bad. P E H
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#5
10-21-2003, 09:16 PM
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Are you sure they are parallel and not series?
Either way, the most likely explaination is a blown (or more likely cracked) strip fuse on the relay. Small piece of aluminum about 3/4" long, 1/4" wide held down by two thumbscrews. Poke it, if it bends, it's cracked and you will have no current to the plugs even if the relay operates. Peter
__________________
1972 220D ?? miles 1988 300E 200,012 1987 300D Turbo killed 9/25/07, 275,000 miles 1985 Volvo 740 GLE Turobodiesel 218,000 1972 280 SE 4.5 165, 000 - It runs!
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#6
10-21-2003, 09:45 PM
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Hopefully it's just the fuse.......
but if it isn't then 16 ohms is too much resistance for the pencil type of glow plugs. One dead gp should still allow it to start , although it'll miss for a few seconds.The manual says the resistance should be less than 1 ohm at 68*F (20*C) at each gp,measured from the connector at the relay.
__________________
Democracy dies in darkness, you have to kick at the darkness till it bleeds daylight
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#7
10-21-2003, 10:37 PM
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I check that fuse it geting power across it and this is my 2th reley when I plug the glow plug back back in to the relay with the key on I can hear a click I thinking of pulling all the plug out and cleaning them up and reinstalling them maybe that will help
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#8
11-03-2003, 06:43 AM
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Gatlif,
Resistance of parallel GP should be lass than one ohm, usually about 0.5 ohms. Are you using the lowest scale on your meter? If one GP reads infinite resistance it is NG, or possibly the wire going to it is broken or has a bad conection. Are you connecting your ohmeter thru the connector removed from the relay?. If you don't remove the connector, you will get parallel readings which are not accurate. You can test GP by connecting them accross battery and observing them to see if they glow bright orange in a few seconds. Note: GP must be removed for this test. P E H
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#9
11-03-2003, 12:30 PM
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How about rigging a #10 or bigger wire from the GPs so a helper could hold it on the battery
 for the start up? How hard would that be to rig up for an "emergency start up ?
__________________
 1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car"
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#10
11-20-2003, 02:18 PM
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Gatliff,
I have been away for about a month. Have you solved your problem? P E H
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