Photo 8 — A separate ground wire is soldered to the back of the socket for an improved ground. Also see Photo 13.
Photo 9 — This is the original base contact inside the bulb's bayonet socket. It was originally crimped leaving wire strands to make contact with the bulb. While this may work, it can be better.
Photo 10 — A small pointed scribe is used to widen the terminal's end where the wires pass through it.
Photo 11 — The finished terminal after crimping and soldering. The soldered surface will make a better contact with the bulb than bare wire.
Photo 12 — A small segment of shrink tubing is applied over the terminal's base. The wire is threaded though the round insulator and spring.
Photo 13 — The other end of the ground wire gets a #6 ring terminal soldered to it. The value of using a threaded rivet here makes it easy to include the ring terminal as a good grounding point.
Photo 14 — Rear view of the assembled cowl lamp with the polished threaded rivets in place.
Photo 15 — The completed cowl lamp is tested using a 6 volt source. The cowl lamps can be set aside ready for installation.