Tell him I will offer him $500 to take his electrical gremlin off his hands
Seriously, there is a chart out there that will show every ground point that normally get's corroded with age. There are a few ground points on our car's.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior
1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**