[QUOTE=Badpuppy;1624942]Check brushes for free travel. Springs get weak after 90 yrs. Sand armature contacts with fine grit & clean grooves with a toothpick. Horn relay usually solves weak horn button contact.
I found that brake cleaner will make the armature contacts look like new without sanding. Also cleans up the whole area. Let completely evaporate before hitting the horn button
or use the non-flammable type.
John