You often have to loose the big column nuts/bolts mounting to dash frame to get clearance for this at minimum.
Do Not loosen screw holding only Ignition switch!If the D switch is fried then likely need new plug too. Try
www.dormanproducts.com to find one as a pig tail.
Solder it because most others won't handle amps used by HL bulbs.
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave