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#16
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My speedo is controlled elctronically. I was surprised to see that when I pulled the cluster out.
Edit: I think my oil pressure guage was elctronic as well.
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B - 1983 300SD |
#17
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Yes, on the W126 all of the guages, including the speedo and oil pressure, are electronic.
Also, if I recall correctly, nearly all of my guages had spasms with the loose engine-chassis ground. I think this was due to where instrument power comes from. BTW, the ground strap itself was not loose, the exhaust bracket it was attached to was. It eventually became bad enough to cause intermittent starting problems.
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Sam 84 300SD 350K+ miles ( Blue Belle ) |
#18
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Quote:
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B - 1983 300SD |
#19
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I am currently dealing with a similar problem with my temperature gauge. The cluster was removed recently to replace the outside temperature sensor, and a few days later my coolant temperature gauge decided to develop a delay. Basically I have to whack the instrument cluster to get it going. Once it does it stays working till I turn the engine off and on again. Most of the time it gets going on its own after about a 20 Second initial delay.
I checked the main connector at the back of the cluster and its seems to be on properly. But thats as far as I got. I'll wait till the problem gets either better or worse before I deal with it again.
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'95 E300 Diesel, 264,000 Miles. [Sold it] |
#20
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Sorry for the misinformation. Thought he had a 123 with the mechanical speedo and possible oil pressure direct feed pressure line. Will look a little more carefully before I jump next time.
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#21
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Quote:
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'82 300SD - 361K mi - "Blue" "Good judgement comes from experience. Experience comes from bad judgement." listen, look, .........and duck. |
#22
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I realize this is an old thread but just wondered if bbeardb ever figured this out.
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
#23
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What's the best way to clean grounds and fuse connections?
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1981 Mercedes 300SD Turbo diesel -- 245,000 2006 Honda CRV -- 53,000 |
#24
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I fixed the jumpy gauge problem on my 240D by adding a separate ground wire from the metal part of the instrument cluster to a ground point under the dash.
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#25
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Quote:
Lesson learned: Whenever messing with anything electrical with the car - always disconnect the battery first. I remember way back shorting the terminal going to the clock as I was connecting or disconnecting the cluster. After that, the gages were jumpy. Only now did I notice the ground ckt of the board burned. The board ckts do not have high ampacity so I can see how this would happen. Obviously less than the smallest fuse so the board ckt acted like a fuse. So, I am doing the same thing you did - running a separate gound which should accomplish the same thing. I was going to resolder the ckt but its difficult to get to where it broke.
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
#26
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No, I never did. If the new ground works for you, let me know. I'd be curious.
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B - 1983 300SD |
#27
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Mine was a burnt solder trace on the back of the gauge cluster. How's your cluster look?
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#28
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Jumpy Gage problem solved
I did run a separate ground wire from the cluster ground to the chassis and that resolved the issue.
The reason the gages got jumpy or bouncy is that they lost their ground. From a suggestion from another member, I closely examined the ckt board where the fuel gage is and traced the problem to an open ground ckt. Mine was on the ground ckt that connects to pin #15. I wanted to jump it with solder but it was tricky to reach. Running a separate ground does the job.
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
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