[TR] od wiring

[Randall]

>  anyone able to provide a step by step wiring of a 73 gt-6
> overdrive....

The diagram I have for a GT6 Mk-3 shows:

W1 gets power from terminal 3 on the ignition switch
W2 goes to the gearbox switch
C1 gets power from terminal 2 on the ignition switch
C2 goes to the solenoid

The other side of the gearbox switch gets wired to the switch in the gear
lever.  The other side of the gear lever switch is grounded.

The diagram appears to have been scanned from some manual, but I don't know
which one or how accurate it is.  But maybe this will help.  The above
description should work fine, even if it isn't exactly the factory wiring.

FWIW, I found that it improved relay life considerably to install a diode
across the contacts, to help absorb the inductive kickback from the
solenoid.  I'm thinking about adding one to the coil side as well, since my
repro operating switch is getting flakey after "only" 15 years.

(Mine is an A-type, but it's the same solenoid as a D.)

-- Randall