So, when I got this car (300d), there were indicator lights on all the time, and the fuel gauge was always pegged.
I fixed a burned through ground on the circuit board and everything worked correctly again.
Months later, i now have a problem where the fuel reserve light, brake light, alternator light and the brake pad warning light all stay on. Coincidentally, I recently discovered that the alternator must have not been charging since the battery was getting weaker and weaker at turning it over. I fiddled around with things and it seems that the alt charges with increased rpms - though the volts *slowly* climb - over maybe 20 seconds to around 14, I think.
Also, when I drive, as the rpms climb, the indicator lights mentioned above all get a little dimmer - sometimes almost out!
I checked the circuit board again and could find no broken paths, including the previous repair.
I'm stumped!
Could the Alt light be on legitimately, but voltage spilling over to the other light circuits?
Any thoughts appreciated!
Thanks

Nathaniel
in Vermont

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My Wheels
1991 Audi 200 20V Avant
1991 VW Westfalia Syncro/Audi I5
1983 Mercedes 300D turbo
1972 Kawasaki H1 500 Mach III
1970's Limongi/Campy road racing bike
1942 Old Town sailing canoe