Dodge trucks from this era are notorious for bulk head problems, the B bodies not so much. Like I said a few posts back, whip out the ohm meter and the wiring diagram.

Fun with connectors: the female side is held in the hood by a small tab that's part of the spade head. Connector hood has a small opening where ya can shove a small flat head in and release the connector from the hood. Bend the tab back up before reinserting or ya get what Gene had. The male side can be released by squeezing it together to release the 1/2 of the spade that acts as a retaining clip. Generally pop right back in. OEM style connectors can be a hunt but that's were a spare / scrap harness comes in handy.