Creating a new thread for this topic that came up on another thread.
This junction box is found between the wiper motor and throttle shaft pivot only on 120s from late '51 to early '52,
and after 20 years we are gradually approaching the point where we can say we have some understanding of it.
My 679187 has one but no wires to it because the car was rewired by a PO.
679042 has one, suggesting the lower limiting chassis number is lower than that given in the SPC.
679183 has one.
679240 has one.
679265 has one.
and thanks to Simon we can see that it has 3 wires and is clipped to some manifold nuts. That is new information.
679359 does not have one, suggesting the upper limiting chassis number may be correct.
On our last discussion of this we concluded that the wiring powered the coil, oil level sender and starting carb, and that this wiring change was related to moving the coil from below the front carb to above it.
However, I thought there were only two wires to the junction box.
So I will be very interested to know about the third wire, what it does.
And yes, this little detail comes under the heading of “running changes made at the factory while keeping up with hectic production schedules” and is probably not covered by the major wiring harness makers of today.