[Mister Pontiac]

Originally Posted by Peter Serio

To go from non-rally to rally: yes you take out 2 wires and exchange places with them. It has been posted here before; I think you are trading places with a tan and a brown wire in the big plug-in.

Thanks for all the intel here, Pete. Great point to bring up, and you are correct about 72. It is different than 68-71, but not by much. The process is the same, but the wire locations in the connector appear to be different for 72.

Nevertheless, I took a look @ my 72 today, including the wiring diagram from the factory manual, and confirmed the swap. Just like 68-71, in 72 you have to trade places with the Brown (Gen Light) and Tan (fuel gauge) wires in the connector. It does appear they are in a different location than the 68-71 plug, but the physical wires are the same and the process is the same. (I did not have my 71 harness available to confirm if the location of the wires in the plug were different, but fortunately, swapping the colors is exactly the same, nonetheless.)

Also, the green wire to the steering column plug is the same for 72, and easily removed @ the top of the steering column. Same as 68-71.

I sure don't mean to hijack the thread, but I hope this info helps others with a 72 doing the same Rally Gauge swap (like me).