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Old 01-12-2010, 12:27 AM
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Join Date: May 2009
Location: sw okla.
Posts: 51
300sd instrument cluster

Several weeks ago I posted about some electrical issues I am having with a 93 300sd. The battery went dead from sitting and we jump started the car,everything was working normal and then the instrument cluster quit working.I disconnected the battery and charged it with a battery charger,when I hooked the battery back up everything worked normally.I drove the car about 5-10 miles and the next day it all quit working again.In my previous post it was suggested that I check and clean the ground from the engine to the frame and replace all the fuses,did all that plus cleaned all the grounds under the hood that are hooked to the body. I still have nothing except temp gauge.Any and all suggestions welcome and greatly appreciated. Also would anyone have a link to the instrument cluster wiring diagram? Thanks for the views and any comment/help.

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Old 01-12-2010, 12:57 PM
blackestate's Avatar
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Join Date: Aug 2005
Location: Washington State
Posts: 948
Have you tried charging hte battery again? May be a battery issue, charge issue, or drain issue. I know when my battery died the instrument cluster was acting strange. Now it is fine.
83 300SD Dark Silver Dark brown inside
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Old 01-12-2010, 03:31 PM
LUVMBDiesels's Avatar
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You can (carefully) yank the cluster and make sure all the brown ground wires are intact.
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Old 01-13-2010, 02:07 AM
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Join Date: May 2009
Location: sw okla.
Posts: 51
Thanks for the replies/suggestions.While I was changing the fuses under the hood yesterday I noticed the wires coming of the glow control box to the glow plugs were deteriorating. The insulation around the wires appears to be crumbling,the glow plugs are working fine,I don't think this would have any effect on my problem the GP light is working. Has anyone made their own harness to replace a bad one,if so how did it work out? I will try charging the battery again (have not had any issues with it since the last charge),will also check the grounds at the cluster.I had the cluster out and checked the plugs all appeared to be good,also tried wiggling them with it running but it made no difference. Also when I first turn on the key several idiot lights blink rapidly 3-4 times.

Last edited by didntdoit; 01-13-2010 at 02:13 AM.
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