|
PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,638
|
The original installation had a thick brown wire from the ground post of the alternator to one of the case studs/nuts. It's good to have, but it's redundant. The alternator also is grounded to the fan housing via the 6 studs that hold it into the housing. The housing in turn is grounded to the engine. All of these points can develop corrosion, and increase the resistance from the alternator to the engine case, which is why Porsche installed the brown ground wire too.
I would retest the alternator output with a ground wire connected to it just to be sure that it still tests bad, but given the other paths to ground, I'll be surprised if that's the case.
__________________
1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
|