as per the haynes wiring diagram, the black/purple wirie runs from the #1(-) term on the coil to the #5 connection on the rear wire bundle on the relay panel. now then, should the #5 pin on the relay be a direct connection to ground?

kevin

Kevin,

My manual shows the bl/pu wire goes to pin 5 through the 12 pin connector. Pin 5 is direct to pin 7 of the 14 pin connector and runs to the Tach. Kevin Check S9. It also looks to me like the ground path for the negative side of the coil is through the condenser or in your case the Compufire. I don't know the more I look at it the more confusing it looks.

Dave

Acording to what I have seen on my 75. The #5 pin on the relay board (12 point engine harness conection) goes to the #7 pin on the relayboard (14 point power harness) and of directly to the back of the tach post #1 completing the ground. The tach gets power from the wire on the back of the tach post #15 wich is from fuse #9 and shard with all the other power in the cluster. The tach works when the points ground and the tach goes up as the points ground faster as the engine ges faster.

EDIT: Dohhh... Dave beat me to it... Cool!