Positive voltage flows from the fuse block to pin 8 on the bulkhead connector through the reverse light switch and back through pin 7 on the bulkhead connector and eventually out to the reverse lamp in the taillights.
If you look at the diagram 71 deputy posted you will see that the Positive voltage is sent to the dash lamp from pin 7 on the bulkhead connector.
You need to find the connector that comes from pin 7 on the bulkhead connector. It is on the engine compartment side of the bulkhead. IF you have the correct dash light then it will have a long pigtail with a grommet on it.
Notice this thread.
https://board.moparts.org/ubbthreads/showflat.php?Number=4995146I do not have my 4 speed car close or I would track it down myself to show you. Sorry about that.
Hope it helps
