Parking Safety Switch On Starting

[fubar XJ]

I've got a '91 XJ, 4.0 AW4. When starting sometimes, the key turns, but it's dead. When I wiggle the shifter back and forth while still in park, it'll "catch" and crank and start. I assume this is a position sensor switch to keep you from starting in any gear but park. How accessible/expensive is it to replace this sensor?

 

[whompinxj]

search for neutral safety switch or nss replacement

 

[Pelican]

There are two threads currently running on the second page of OEM tech including a link to a repair procedure.