66 Barracuda horn loses ground at the coupler

Here is one for the experts.

I have a friend with a 1966 Barracuda and the horn does not work. We have chased the problem down to the fact that there is no ground between the steering column center shaft and the gear box. Does anyone know if JB weld has conductivity? The plan would be to put a spot of JB weld on the spline to coupler connection to make a ground.

Thoughts?????

Thanks for any help in advance.

The horn switch is the ground but it should ground through the outer column parts not through the center...Is there a ground wire from the column to the dash frame ???

You just need the OE short piece of black wire with ring terminals on each end (or make one up) to connect (ground) the column to the dash frame