Hey, Dweller! why are you using one of those 'old-fashioned' geographic schematics? Current-flow diagram a bit too 'spaced-out,' huh?
The 'Thing' is a multiple ground connector!
I couldn't hurt to go through all of the dash grounds and clean & tighten them up by crimping the sides of the 1/4" Faston connectors slightly! Don't close the gaps completely!
This is essentially the same issue and remedy as for the 'dim' instrument lamps ... except there are alot more of the lamp holders, AND places for corrosion to sneak in ... a bit of silicone grease on the connections AFTER the repairs are completed wouldn't hurt to fight off corrosion for another 20 years!
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Warren Hall, Jr.
1973 911S Targa ... 'Annie'
1968 340S Barracuda ... 'Rolling Thunder'
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