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  #1  
Old 10-31-2012, 07:57 AM
ytmtnman's Avatar
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Location: Acworth, NH
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1983 300TD Warning and Glow Plug Light Oddities

Good day everyone-

Background:
When I got my wagon last May, the glow plug light would come on normally when the key was in the glow position. After 10 or 15 seconds, the light would dim but remain lit. I took this to mean that under normal conditions the light would have shut off at that point, but something was causing it to remain dimly lit. The light would turn off completely when the Fasten Seat Belt light went out after starting the motor.

Foreground:
Yesterday I turned the key to the glow position, the GP light came on, and then went out after 10-15 seconds. I though "hey it finally works as intended". I started the car and after about 45 seconds of running, the GP light and the Fasten Seat belt light illuminated. I did not hear the GP relay click, but I wasn't listening for it either. I tried unbuckling my belt and the warning buzzer sounded. I rebuckled and the buzzer stopped.
The lights went out again after about 2 minutes of motor running time and didn't return the entire trip. No other noticeable signs of problems in the electrical system. I don't smell anything burning and no smoke (YAY).
This same scenario is repeated upon three successive starts throughout the day.

Any ideas? Bad ground? Is this causing my glow plugs to light? Do I just say " Oh well, she runs great otherwise"
Thanks in advance!

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  #2  
Old 10-31-2012, 08:02 AM
jay_bob's Avatar
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bad ground

Check the cluster itself, it relies on connection between the three parts (left/right/center) to maintain grounding continuity for the bulbs on the right back to the big plug on the left.
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2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles)
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  #3  
Old 10-31-2012, 09:15 AM
vstech's Avatar
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that GP relay is from a 93 300D2.5 I think, there may be an issue with it's circuit.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #4  
Old 10-31-2012, 09:16 AM
vstech's Avatar
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IIRC, it has no fuse under the cover. internally protected from shorts.
perhaps there is something in there that confuses the dash lights?
I do remember it had 5 pins, instead of the 4 pins on the control plug, but the 4 pin harness connected just fine.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #5  
Old 10-31-2012, 09:16 AM
vstech's Avatar
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Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 27,092
I posted a thread about it back in november of last year I think...
I'll try and find the thread.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #6  
Old 10-31-2012, 09:20 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 27,092
found it.
http://www.peachparts.com/shopforum/diesel-discussion/317122-wheres-fuse-whats-extra-pin.html
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #7  
Old 10-31-2012, 11:30 AM
ytmtnman's Avatar
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Location: Acworth, NH
Posts: 277
I have a spare controller from an 83 300sd, om617. Is my spare controller usable in my wagon?
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  #8  
Old 10-31-2012, 11:53 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
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Location: Mount Holly, NC
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yes. should be the same controller.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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