Topic: Different ignition switch for '65 GT

[drummingrocks]

Does a factory '65 GT use a different ignition switch from a non-GT?  I recently purchased a '65 GT coupe and have been working on getting it running.  When I turned the key, it was immediately obvious that something was wrong with the ignition switch; you couldn't feel any of the detents or that the key was actually doing anything (if that makes sense).  I took the dash out, and the switch has been replaced before, and the red-green wire has been spliced into.

I looked at the Osborn '65 electrical assembly manual, and it appears that '65s with the GT option used a 4-wire ignition switch, whereas all other non-GT '65s used a
3-wire ignition switch.  Is that correct?  I wanted to verify before changing anything with the existing wiring.

[J_Speegle]

Believe you will find that the original switch itself were all the same. Any difference would be in the plug/wiring if there were (haven't looked and compared those as of now

[jwc66k]

Per the 64, 65 and 66 Mustang Electrical Assembly Manuals (by Osborn) the same switch is used, C3AB-11572-B1 or B2.
Jim

[midlife]

All 64.5 through 67 ignition switch plugs on the underdash harness have 3 pins, and although there are differences in molded plug design, they are electrically the same plug/pin placement. 
I prefer to not refer to "4 wires" as a descriptor, rather I use 3 pin plug with 4 wires.  Just using the number of wires to describe a plug becomes ambiguous when multiple wires originate from a single pin at a molded plug.

[drummingrocks]

I prefer to not refer to "4 wires" as a descriptor, rather I use 3 pin plug with 4 wires.  Just using the number of wires to describe a plug becomes ambiguous when multiple wires originate from a single pin at a molded plug.

That's a good point.  Thanks, everyone, for the information.