Low Beams dead, Hi Beam Fine?

Removing and cleaning and even repairing isn't that bard once you'r doing it.
Removing the connector engine side. question on the main harness plug on firewall

One of a couple discussions on cleaning here:
https://www.forabodiesonly.com/mopar/threads/cleaning-bulkhead-connectors.446706/
With the headlight relays, the original headlight terminal connections at the bulkhead don't carry much current but it still has to be OK.