My '98 Bravada has a problem with the rear wiper motor
and rear defroster. The fuses are OK and I replaced the
rear wiper motor as it was only working intermittently
before finally quitting. They still do not work. Is there
an in line fuse somewhere?

No inline fuses. Probably two separate, nonrelated problems. Open the hatch glass and check the wiring going to the glass, both sides.

Open the tailgate and check the wiring inside the rubber boot. Constant opening and closing of the gate will eventually break the wires. Check for power and ground at the motor, (key ON and wiper switch ON) while wiggling the wires in the boot.