Greetings SNTINO MARC!
Welcome to the Forums and the world of Vintage Airstream ownership!
Originally Posted by SANTINO MARC
I really need a wiring diagram for a 1962 Ambassador 28'. if anybody has one (even if it is a hand drawn one) for the trail umbilcal I could sure use it. Thanks
This is an educated guess on my part, but I highly suspect that you will find that all of the umbilical wires are the same color once you open your access panel. I don't believe that Airstream began using color coded wires for this process until 1964
. In the event that all of the wires are the same color, their function was identified by the number of knots in the wires.
1960 Knotted Wire Functional Identification
This identification process may not have been consistent from year to year, and may not have been consistent when comparing Ohio and California manufactured coaches.
Good luck with your project!