1996 grand cherokee

Can anyone tell me how to fix my heated seats in my Jeep?

Check fuse. Check for power and ground at seat connections. No power,
check switch and wiring. Yes power, check continuity through the heated seat
back and seat cushion elements. Replace the one that is broken. They are
wired in series so if either on goes open, both stop working. I think you
will find that the seat cushion in open. They heating grids are available
separately.