On this age of vehicle, you most likely have a wiring issue as they get brittle and high resistance so running new wires is a good idea.
However, I would try and run them to your existing switch. Just cut them a couple inches behind each connector and then run your own wires.
https://www.2carpros.com/articles/how-to-check-wiring
It could be a connection issue so you will want to check the connections and if they are ok then the wiring should work.
However, if you just want to run your own switch then the wiring diagram below will help with this.
Let me know what questions you have. Thanks
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Thursday, March 31st, 2022 AT 3:41 PM