Hello, and welcome to JA!! lets first check these fuses. there is a 30 amp fuse in the underhood fuse block marked RR HVAC, and the other is ign 3 a 10 amp in the same fuse block. if these check ok, let me know, and i can you some more things to check.
also do you have access to a testlight or a voltmeter??
Ok, good, we need to check the power and ground at the rear blower motor. this will tell us if we a bad blower motor or a electrical problem to the blower motor.
you will need to remove the right rear quarter molding to gain access to the blower motor. there is two wires going to the blower motor. one is a purple wire, which should have 12 volts when the blower is turned on. the other is a black wire which is ground. if you have a test light, just go across the purple and black, if the the test lights then the power and ground is good!! and the blower motor is bad!!
sure the rear blower motor takes a little less than an hour to replace labor time is .7 of an hour. and here is the part price. depending on what the shop rate is, translate to about 50- 75.00 dollars in labor