All of the Pups, regardless of whether they were LS trim level or not, included the cutouts and weld nuts in the doors for mounting the door activated switch for a dome light. My Pup had black plastic plugs in the holes, but as you can see below I now have the switches in my doors.
I found this dome light in a junkyard Isuzu that was I believe about a '91 or '92 model. The cutout in the roof header isn't quite large enough to fit this dome light so I had to cut away at the bottom right corner of the cutout with a dremel cut-off wheel and remove just a bit of material. It's not much, but you have to do it to keep the ring terminals from touching the metal and shorting out.
I got a couple of flat blade terminal connectors, some wire and a wire splice. I used some mechanics wire to fish the wire through the cab, left plenty of excess wire and then cut and spliced everything. Now I have a nice bright dome light that comes on with the driver and/or passenger doors.
A word of note. These door switches are definitely susceptible to corrosion so I had to clean out the area that makes contact to ground and also chase the threads in the weldnuts since they'd never been used.
