No, unfortunately.
I replaced the switch checked fuses and still no buzz. Fiddling around under the dash I found a set of wires ( 3 total ) that had been cut. The truck has an after market alarm system that I suspect was tied into the door switch. Unfortunately, the previous owner had pulled the fuses because the alarm kept going off, probably because of the broken switch. I have not been able to locate the inline fuse holders and he does not remember more than " under the dash ". My last excursion under the dash ended with me wedged between the seat steering column and hand controls barely on my wheelchair. Fortunately the local paramedics are close by and were able to extract me from that rather awkward position.
Needless to say I've not ventured back under there since. 
We did find the positive terminal for the battery had gone bad. No manner of tightening was going to keep it on. I replaced the terminal and a lot of our dead battery issues have been resolved.
Thanks
1996 Montero SR
1985 Jeep Cherokee Chief Retired
2011 Permobile C300 w/Tilt & Recline Wheelchair
2010 Extreme 4x4 Wheelchair