5K Hot Seat

[Steve Sherman]

I got an odd problem with my 86 5KTQW.  The right passenger seat gets
hot, the bottom part.  Not too bad at first especially on cold days, but
after 30 min or so it starts to get unpleasant.  I've checked the
battery, and all is well and cool there.  The only other thing I can
think of is a bad connection in the seat belt switch inside the seat.  A
bit hard to get to, as it seems to be buried in the foam of the seat.

Any BTDT before I tear the foam up?

TIA