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  #1  
Old 03-07-2008, 12:06 PM
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Join Date: Oct 2007
Location: NW FL
Posts: 27
GP Controler ?

My 96 won't start when the temp is below 40.
My indi replaced the glow plugs-2 were bad.
But it still won't always start.
GP light doesn't always come on.
Tech thinks it is the GP controller.
What is that?
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Lee C.
87 300 TD 225000 k
96 300 D 82000 k
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  #2  
Old 03-07-2008, 12:24 PM
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Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
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Pre-Glow Relay

Part # (MAY BE) 0155453032 ($140-150 'ish)

Check your Glow pugs again , If one or more is bad the dash light may not
illuminate to let you know of a problem (usually the#1 plug)

See if there is a strip fuse inside the relay itself (It must be tested with a
multi-meter for continuity,visual inspection may miss a hairline crack)

Check the wiring diagram for a fuse in the fuse box that protects the dash
"Pre-Glow relay indicator light".

Last edited by compress ignite; 03-07-2008 at 03:00 PM.
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  #3  
Old 03-07-2008, 12:42 PM
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Join Date: May 2007
Posts: 746
Quote:
Originally Posted by Lee C View Post
My 96 won't start when the temp is below 40.
My indi replaced the glow plugs-2 were bad.
But it still won't always start.
GP light doesn't always come on.
Tech thinks it is the GP controller.
What is that?
Is it throwing any codes?
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  #4  
Old 03-07-2008, 01:32 PM
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Posts: 4,263
There are six small fuses inside the unit. I don't think they are intended to be replaced.
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  #5  
Old 03-07-2008, 02:25 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA (one day 6052'53.93"N, 15049'39.24"W)
Posts: 4,865
Pretty easy to test with a multi meter.

Go to dieselgiant.com and follow the tutorial there for the W123.
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Terry Allison
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09' E320 Bluetec 77k
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  #6  
Old 03-07-2008, 03:02 PM
compress ignite's Avatar
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Location: 32(degrees) North by 81(degrees) West
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Dash "Glow Light"bulb out?

I know , It's Too Easy.

But,remember you may have two(2) problems with the Glow system,and the
Light on the dash Might be a separate issue from the unhappy start.

Last edited by compress ignite; 03-07-2008 at 03:32 PM.
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  #7  
Old 03-07-2008, 03:35 PM
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Location: Long Beach,CA
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Multimeter with back light on sale at Harbor Freight $4.
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  #8  
Old 03-07-2008, 04:11 PM
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Location: Walnut Creek, CA (one day 6052'53.93"N, 15049'39.24"W)
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Quote:
Originally Posted by Diesel911 View Post
Multimeter with back light on sale at Harbor Freight $4.
Thats the one I bought; I'm electrically challenged and figured that tools quality was greater than my ability.
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09' E320 Bluetec 77k
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