Trying to figure out 308 antenna switch...

I've read all the archives and the more I read, the more confusing it gets. I just received a replacement switch from Ferrparts. It is a 3 position toggle with center, up and down. The bottom has 8 numbered positions with 5 connectors laid out like this: the / represents a connector

1/ 2
3 4/
5 6/
7/ 8/

My '77 has 3 wires: (2)-red/whites with power and (1) gray for the ground

I have tried various arrangements and then tested power at the red/whites at the antenna. I have not hooked up the antennas yet. It is a semi-automatic

I have not been able to configure it to give power to one wire while in up, one wire while in down and none while in the center position.
I have been able to get the up and down individual power, but it still leaves me with power to one wire while in the center position also

 

In the last 20 years, auto radios have an 'antenna' output. It provides +12v when the AM or FM radio is on. Antennas take this input (plus +12V always on), and motor fully up when the radio wire is hot and motor fully down when voltage disappears from the radio. That said, modern antennas such as those used for replacement do not require use of the Ferrari Antenna switch.

You may know this already but I'm trying to read between the lines and restating in case it has value to you. What I don't understand is your use of the term 'semi-automatic' when applied to the antenna. Can you describe the term further?

The Ferrari antenna switch simply provides +12V from left fuse F (gray) to either the up or down wire which are each usually white/red. If your question asks which terminals on the switch to use, I looked but can't find my switch. If you have a spare switch nut, I need one badly (which is why my switch isn't in the car).

To use a volt/ohmeter to analyze your new switch to learn which terminals to use, first touch the meter leads together so you know the meter is working. Now turn the switch to up (or down). Hold the meter wire 1 to switch terminal 1 and the meter lead 2 to each other terminals looking for contact (the same reading you got when you touched the meter leads together). If none reads contact, move meter lead 1 to the next terminal and repeat the search with meter lead 2. When you do find contact, record the terminals found, change the switch from down to up, and repeat.

When complete you should have noted for example that 'up' contacts are 4 and 6 and 'down' contacts are 3 and 6. Meaning the white/red wires go to 3 and 4 while the fused input wire (usually gray) goes to 6, the common terminal.

Note I got this information from the wiring diagrams and the owner's manual, BOTH of which are indispensable for chasing wiring unknowns.
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