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  #1  
Old 10-31-2008, 02:19 PM
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Location: Carmel, CA
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Angry What did I do???

Here is what I did......

On my daughter's 1982 240D I removed the instrument cluster repaired the odometer hooked everything back and thought I did a great job. Key word there is "thought".

Here is the problem.....

There is something wrong with the gauges. The fuel and temp gauge jump all over the place. When you turn on the left or right directional the same gauges jump as the directional clicks on and off.

What is wrong??? I've removed and reinstalled the cluster with no success. The problem is still there.

HELP!!!!!!!

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1973 280 - Sold
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1989 260E - Sold
1989 560SEL
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  #2  
Old 10-31-2008, 02:22 PM
bgkast's Avatar
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Make sure the big round plug is securely plugged in, then check your ground wires.
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  #3  
Old 10-31-2008, 02:27 PM
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Ground wires??? Where are they???
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1973 280 - Sold
1980 300SD - Sold
1982 240D - Stolen
1988 300E - Sold
1989 260E - Sold
1989 560SEL
1994 E420 - Sold
1997 E420
2005 CL500
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  #4  
Old 10-31-2008, 03:33 PM
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Location: Albany, OR
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Each gauge is grounded to the one next to it. So make sure you check the circuit boards of the two outside gauges to make sure you didn't burn one of the lines. To check to see if it's a gound issue you can connect a wire from one of the screws on the back of the cluster to the big ground connection behind the cluster. If adding that ground wire solves the issue then you've got a bad ground somewere in the clutster electronics. And as Bryan pointed out make sure the big plug in the back is plugged in all the way.
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  #5  
Old 10-31-2008, 03:37 PM
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sounds like an intermittent ground connection
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  #6  
Old 10-31-2008, 09:27 PM
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There are also ground wires right behind the cluster, in the dash, you should see it as soon as you remove the cluster out. Brown lines = ground
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  #7  
Old 10-31-2008, 10:22 PM
theo3000's Avatar
Leadfoot
 
Join Date: Dec 2006
Location: Apple Valley CA
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Same thing happend to me. Rig a dedicated ground wire.
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  #8  
Old 10-31-2008, 11:02 PM
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The large plug is 'clocked', it must be plugged-in in a certain way, there is a semi-circle pin and receiver to insure this happens, sometimes the receiver gets broken and it gets plugged-in one position off... some gauges still appear to work.
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  #9  
Old 10-31-2008, 11:19 PM
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Join Date: Jul 2007
Location: USA
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there a bunch of ground wires that are grounded on the part of body that holds the steering column via bolts. removing the instrument cluster or dash will give you access to them. there are not too many compared a w201 im working on now which has a parastic battery drain which has over 20 ground wires being grounded to the same place. Woo hoo!

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1986 300SDL, 211K,Dealership serviced its whole life
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