I just bought an 87 r10 but windshield wipers didn't work so I replaced the motor and was replacing the switch in the console when I realized there was no connector to that switch. After investigating it a bit more found a connector but is to a wiper switch that goes in the dash like my 82. hooked up the switch from the 82 an it works. why would the wiring harness behind the dash be from an earlier model? I'm at a loss. thanks for any help