Topic: Wiring Part number help

[cool67]

I have a  1965 mustang main harness laying around that I want to use for an upcoming project Part number on the main harness is C5ZB-14401-M. I know it is for warning lites and not guages as it has all the sockets for warning lites. Can sombody tell me if this harness is for 2 or 3 speed heater? Any other info would really be appreciated.

[CharlesTurner]

It's easy to tell the difference.  The 2 speed heater motor has a plug for the fan switch and no wiring to the heater box.  The 3 speed setup has integral wiring in the switch with a yellow power plug at the heater box(in the main harness).