Rallye cluster clock wiring

[71Satellite98661]

Big thanks to Kenny and Steve for the last advice on wire harness routing. One more question regarding the clock wiring on rallye instruments. The FSM isn't very clear by only showing the feed from the ammeter to the clock. It does not specify which of the t-shaped connector on the back of the clock is 12v and which is ground. I do not have a factory clock harness and figure I can make one out of a section of the old harness if I can get a little direction.

[JimT1971RR]

To my knowledge, which is by looking at a clock that used to be in my car and the FSM, there is only one wire feeding to the clock. This will be the positive wire the FSM shows coming from the amp meter. The ground is done directly by the cluster. The back of the clock is metal and is screwed directly to the cluster which provides the ground. The cluster being grounded can be seen by looking at the illumination light diagrams in the FSM picture. They show that the positive is supplied by the wire while the ground is by the bulb harness as it connects to the cluster.

I am pretty sure I am correct about this, however, the clock I had in my never worked so I can't be 100% positive.

[71Satellite98661]

Thanks Jim! I failed to mention that this is a quartz upgraded clock from Instrument Specialties. They have (2) male spades in the back so I called them the other day. For some reason, it still only used one terminal! No idea what the other one is for. We shall see if it functions by the end of this weekend!