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Old 12-10-2002, 08:26 AM
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Join Date: Jul 2001
Location: Motor City. MI
Posts: 73
w107 grounding problem

gauges go crazy when turn signals are applied. have inst. cluster out but need wiring diagram or guidance to isolate which pin, etc. is ground. ..for example:.. each guage has a brass stud fixing it to cluster. assume this is not a live connector. guage also has brass rivets coming through circuit board. continuity check between these 2 is live. any ideas short of $380. for new guage cluster?

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Old 12-10-2002, 03:02 PM
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Join Date: Jan 2002
Location: Niceville, FL
Posts: 471
Going from memory here, but I believe there is a central ground on the firewall behind the instrument cluster. Believe there is another on the passenger front sidewall by the OVP relay. One more I think, but don't recall where.

Also, I have an instrument cluster I bought off eBay that I can part with reasonably if you must have one.

'85 500SL (Euro) - 186,000 w/a complete restoration and engine rebuild at 154,000
'95 C280 - 174,000
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