Gary,
Does anyone have hens teeth?
Last month some lucky person found a NOS Ranger function switch at the Rickreall fester in Orygun. Wish it were me.
So: If'en your issue is just a burned toasted contact, common problem with Rangers; take a good look at the toasted switch. With luck there is an unused contact of the same length. I've used a Dremil tool with a small cutter to remove the rivet holding the burned contact and a good one. Then with a very small machine screw & nut, place the good contact where needed.
Hope this helps.
Craig