Hello All Been lurkin for a few week ? about ammeter and alternator

[nkaminar]

The original car had the engine pans that electrically connected the engine to the frame. Most cars no longer have these. The ground connection to the transmission bolt is good but the standard practice now is also to run a ground from the battery to the frame somewhere. All the accessories such as the lights and horn are connected to the frame, so if there is not a good connection between the engine and frame then that could cause problems.