I have 91 Jeep Cherokee xj. I have a pair of off road lights they came off my Bronco long time ago... But I don't have a toggle switch for them anymore Could I use the switch from my rear windshield wiper ? But its a 4 prong switch can I wire it up to where it will work?

 

Check the ratings on the switch. It will probably be rated higher than 12V, but note the current(amps) rating. If you're going to direct wire the lights, the current might exceed the ratings and fry your switch. Not good. I'd suggest you wire it up using a relay like the regular headlights. The relay will put much less current thru your wiper switch.

 

Thank you