always my pleasure! key switch relay might have over-heated during its life from either low voltage or dirty contacts where relay plugs into fusebox. i'd try that first. it crosses over to popular ford and chrysler a/c relays available at most auto parts joints. rated @ 20 amps. here's cross reference for more of them.....
Duralast Part#19389---retails for about 8
Panasonic CM1-D-12V---""""""""""""""""" 5
dealer part # is H-D#31522-00