Thread: Spark Question
View Single Post
Old 08-08-2020, 12:24 PM   #44
Jim/GA
Senior Member
 
Jim/GA's Avatar
 
Join Date: May 2010
Location: Young Harris, GA
Posts: 1,808
Default Re: Spark Question

Quote:
Originally Posted by txmike View Post
ok another dumb question. Ground wire go to upper plate or the distributor housing
It's not really a "ground wire".

The wire from the lower plate connects back to the wire that goes up to the ignition switch, which then goes to the coil + post (in Henry's original wiring scheme -- not the "modified wiring scheme" that many use).

This wire CANNOT touch a ground anywhere or the engine will not run (you won't get a spark).

This wire goes up and connects to the little nut connector on the side of the modern points, the same place where the condenser connects to.



When connecting to the points, it is critical that this wire end NOT touch the upper plate itself or the side of the distributor housing. Those are grounds and they will make the engine not run (you won't get a spark).

The points themselves, and only the points, provide the ground to this wire when they close, and take the ground away when they open.

Hope this helps.

__________________
Jim Cannon
Former MAFCA Technical Director
"Have a Model A day!"
Jim/GA is offline   Reply With Quote