"The TruTrak needs a GPS signal, and should be getting one
from the Pinpoint GADAHRS which is receiving the 1101 GPS signal.  (I am
not using the GPS on the Pinpoint)  The Chelton is getting the correct
signals from the 1101."

Wiring diagrams I've seen from Chelton show the output of the GPS being wired directly to both the Chelton and the TruTrak.  The GPS data for the TruTrak is not routed through the Chelton.

Tom Gourley